case class - Page 214 - Developer IT

class NSCFData autoreleased with no pool in place

- by iSight

Hi, I have converted my NSString into string, and returning the same but the above error mentioned in the title is printing on console. Please suggest so that i could get away from this issue. my code is below: string stringFromNSString(NSString *inNSString) { return [inNSString UTF8String]; }

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jquery elementby class and set name

- by tom

Hello can some one help me with code to get element by classname and also change the name currently ive tried $('selected').attr("name", 'blah blah'); and also $('.selected').attr("name", 'blah blah'); noneof these work thanks

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NSUSERDefaults class HAVE PROBLEM OR NOT?

- by user174761

NSString string = @"Hardwork"; NSUserDefaults defs111 = [NSUserDefaults standardUserDefaults]; [defs111 setObject:string forKey:@"first_name_textfield"]; Hi, In my code I'm enable to set this value string for key first_name_textfield. Why is it,so?

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Check if class has been instantiated

- by Holman716

In my current program I have a main window and a secondary window that pops up when a button is pressed. If the secondary window is currently shown but doesn't have focus the button will instead bring it to focus. At this time I am creating a new instance of the secondary window as the main window loads and simply checking its status with SubWindow.IsDisposed and SubWindow.CanFocus I have found that if I do not create a new instance at the beginning SubWindow.IsDisposed throws an exception. As long as I'd previously created an instance of SubWindow the check runs fine. My question- The current version works fine but is there a better way of doing this? It is not a huge concern, but it feels like it'd be better to be able to check for existence without having to guarantee that it has existed at least once before.

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[jquery] Different function for same class on 'click' / 'dblclick'

- by Shishant

Hello, This are my two functions, on single click it works fine, but on dblclick both functions execute, any idea? I tried using live instead of delegate but still both functions execute on dblclick // Change Status on click $(".todoBox").delegate("li", "click", function() { var id = $(this).attr("id"); $.ajax({ //ajax stuff }); return false; }); // Double Click to Delete $(".todoBox").delegate("li", "dblclick", function(){ var id = $(this).attr("id"); $.ajax({ //ajax stuff }); return false; });

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Do we still have a case against the goto statement? [closed]

- by FredOverflow

Possible Duplicate: Is it ever worthwhile using goto? In a recent article, Andrew Koenig writes: When asked why goto statements are harmful, most programmers will say something like "because they make programs hard to understand." Press harder, and you may well hear something like "I don't really know, but that's what I was taught." For that reason, I'd like to summarize Dijkstra's arguments. He then shows two program fragments, one without a goto and and one with a goto: if (n < 0) n = 0; Assuming that n is a variable of a built-in numeric type, we know that after this code, n is nonnegative. Suppose we rewrite this fragment: if (n >= 0) goto nonneg; n = 0; nonneg: ; In theory, this rewrite should have the same effect as the original. However, rewriting has changed something important: It has opened the possibility of transferring control to nonneg from anywhere else in the program. I emphasized the part that I don't agree with. Modern languages like C++ do not allow goto to transfer control arbitrarily. Here are two examples: You cannot jump to a label that is defined in a different function. You cannot jump over a variable initialization. Now consider composing your code of tiny functions that adhere to the single responsibility principle: int clamp_to_zero(int n) { if (n >= 0) goto n_is_not_negative: n = 0; n_is_not_negative: return n; } The classic argument against the goto statement is that control could have transferred from anywhere inside your program to the label n_is_not_negative, but this simply is not (and was never) true in C++. If you try it, you will get a compiler error, because labels are scoped. The rest of the program doesn't even see the name n_is_not_negative, so it's just not possible to jump there. This is a static guarantee! Now, I'm not saying that this version is better then the one without the goto, but to make the latter as expressive as the first one, we would at least have to insert a comment, or even better yet, an assertion: int clamp_to_zero(int n) { if (n < 0) n = 0; // n is not negative at this point assert(n >= 0); return n; } Note that you basically get the assertion for free in the goto version, because the condition n >= 0 is already written in line 1, and n = 0; satisfies the condition trivially. But that's just a random observation. It seems to me that "don't use gotos!" is one of those dogmas like "don't use multiple returns!" that stem from a time where the real problem were functions of hundreds or even thousand of lines of code. So, do we still have a case against the goto statement, other than that it is not particularly useful? I haven't written a goto in at least a decade, but it's not like I was running away in terror whenever I encountered one. 1 Ideally, I would like to see a strong and valid argument against gotos that still holds when you adhere to established programming principles for clean code like the SRP. "You can jump anywhere" is not (and has never been) a valid argument in C++, and somehow I don't like teaching stuff that is not true. 1: Also, I have never been able to resurrect even a single velociraptor, no matter how many gotos I tried :(

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Inserting THEAD element into embedded HTML using jQuery

- by robalot

I'm trying to use jQuery to insert HTML into a table element. I've been messing variations of the selector (below) with no luck. Can someone help me? My Selector: $j('#ctl00_body_gridData_dom').children('table:first').append("<thead><tr><td colspan='6'> </td><td align='center' colspan='7'>EM SPECS</td><td align='center' colspan='7'>FISH</td><td colspan='11'> </td></tr></thead>"); Here's what I am trying to do... I want to insert this: <thead> <tr> <td colspan="6">   </td> <td align="center" colspan="7"> EM SPECS </td> <td align="center" colspan="7"> FISH </td> <td colspan="11">   </td> </tr> </thead> The sample below is what I want the end result to look like... So It Looks Like This: Jquery Event Pool <table id="ctl00_body_gridData" style="width: 2000px; -moz-user-select: none;" border="1" cellpadding="0" cellspacing="0"> <tbody> <tr> <td id="ctl00_body_gridData_dom" class="GridData" style="vertical-align: top; height: 245px;" valign="top"> <table style="width: 100%;" border="0" cellpadding="0" cellspacing="0"> <thead> <tr> <td colspan="6">   </td> <td align="center" colspan="7"> EM SPECS </td> <td align="center" colspan="7"> FISH </td> <td colspan="11">   </td> </tr> </thead> <tbody> <tr id="ctl00_body_gridData_top_head" class="headerlineGrid"> <td width="16"> <div style="width: 16px;"></div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,4,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,4,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,0,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,4,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,4,0)" style="width: 89px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 89px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Work<br>Package</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,6,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,6,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,1,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,6,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,6,0)" style="width: 62px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 62px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Work<br>Order</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,9,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,9,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,2,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,9,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,9,0)" style="width: 66px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 66px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> FCR<br>Group</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,12,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,12,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,3,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,12,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,12,0)" style="width: 105px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 105px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center">Contractor</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,15,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,15,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,4,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,15,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,15,0)" style="width: 159px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 159px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Capital/Expense<br>Group</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,19,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,19,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,5,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,19,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,19,0)" style="width: 99px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 99px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center">Cost Type</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,20,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,20,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,6,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,20,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,20,0)" style="width: 81px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 81px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Commit<br>Dollars</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,21,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,21,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,7,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,21,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,21,0)" style="width: 81px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 81px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Commit<br>Hours</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,22,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,22,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,8,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,22,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,22,0)" style="width: 86px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 86px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Commit<br>Quantity</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,23,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,23,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,9,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,23,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,23,0)" style="width: 76px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 76px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Control<br>Budget</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,24,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,24,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,10,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,24,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,24,0)" style="width: 46px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 46px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center">FTC</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,25,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,25,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,11,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,25,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,25,0)" style="width: 88px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 88px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Total<br>Forecast</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,26,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,26,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,12,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,26,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,26,0)" style="width: 50px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 50px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Ctr<br>COB</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,27,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,27,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,13,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,27,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,27,0)" style="width: 49px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 49px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Ctr<br>CCB</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,28,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,28,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,14,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,28,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,28,0)" style="width: 81px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 81px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Ctr<br> Commit<br>$</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,29,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,29,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,15,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,29,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,29,0)" style="width: 81px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 81px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Ctr<br> Commit<br>Hours</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,30,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,30,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,16,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,30,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,30,0)" style="width: 86px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 86px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Ctr<br> Commit<br>Quantity</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,31,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,31,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,17,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,31,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,31,0)" style="width: 95px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 95px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Ctr<br>% Compl.</td> </tr> </tbody> </table> </div> </td> <td onclick="ctl00_body_gridData.ClickHandler(event,this,32,0)" ondblclick="ctl00_body_gridData.DblClickHandler(event,null,32,0)" onmousemove="ctl00_body_gridData.MoveHandler(event,this,18,0)" onmouseover="ctl00_body_gridData.OverHandler(event,this,0)" onmouseout="ctl00_body_gridData.OutHandler(event,this,0)" onmousedown="ctl00_body_gridData.DownHandler(event,this,32,0)" onmouseup="ctl00_body_gridData.UpHandler(event,this,32,0)" style="width: 105px;" class="HeadingCell" align="center"> <div style="text-align: center; overflow: hidden; width: 105px;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="white-space: nowrap; text-align: center;" class="HeadingCellText" align="center"> Contractor<br>CFTC</td> </tr> </tbody> </table> </div> </td> </tr> <tr> <td id="ctl00_body_gridData_expcolgrp_0" width="16" align="center"></td> <td class="GroupHeading" colspan="20"> FCR<br>Group: Engineering</td> </tr> <tr> <td id="ctl00_body_gridData_expcolgrp_1" width="16" align="center"></td> <td class="GroupHeading" colspan="20"> FCR<br>Group: Pipe</td> </tr> <tr> <td id="ctl00_body_gridData_expcolgrp_2" width="16" align="center"></td> <td class="GroupHeading" colspan="20"> FCR<br>Group: Concrete</td> </tr> <tr> <td id="ctl00_body_gridData_expcolgrp_3" width="16" align="center"></td> <td class="GroupHeading" colspan="20"> FCR<br>Group: Insulation</td> </tr> <tr> <td id="ctl00_body_gridData_expcolgrp_4" width="16" align="center"></td> <td class="GroupHeading" colspan="20"> FCR<br>Group: Buildings</td> </tr> </tbody> </table> </td> </tr> </tbody> </table> </body> </html>

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Dependency injection in constructor, method or just use a static class instead?

- by gaetanm

What is the best between: $dispatcher = new Dispatcher($request); $dispatcher->dispatch(); and $dispatcher = new Dispatcher(); $dispatcher->dispatch($request); or even Dispatcher::dispatch($request); Knowing that only one method of this class uses the $request instance. I naturally tend to the last solution because the class have no other states, but by I feel that it may not be the best OOP solution.

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SQL SERVER – Curious Case of Disappearing Rows – ON UPDATE CASCADE and ON DELETE CASCADE – Part 1 of 2

- by pinaldave

Social media has created an Always Connected World for us. Recently I enrolled myself to learn new technologies as a student. I had decided to focus on learning and decided not to stay connected on the internet while I am in the learning session. On the second day of the event after the learning was over, I noticed lots of notification from my friend on my various social media handle. He had connected with me on Twitter, Facebook, Google+, LinkedIn, YouTube as well SMS, WhatsApp on the phone, Skype messages and not to forget with a few emails. I right away called him up. The problem was very unique – let us hear the problem in his own words. “Pinal – we are in big trouble we are not able to figure out what is going on. Our product details table is continuously loosing rows. Lots of rows have disappeared since morning and we are unable to find why the rows are getting deleted. We have made sure that there is no DELETE command executed on the table as well. The matter of the fact, we have removed every single place the code which is referencing the table. We have done so many crazy things out of desperation but no luck. The rows are continuously deleted in a random pattern. Do you think we have problems with intrusion or virus?” After describing the problems he had pasted few rants about why I was not available during the day. I think it will be not smart to post those exact words here (due to many reasons). Well, my immediate reaction was to get online with him. His problem was unique to him and his team was all out to fix the issue since morning. As he said he has done quite a lot out in desperation. I started asking questions from audit, policy management and profiling the data. Very soon I realize that I think this problem was not as advanced as it looked. There was no intrusion, SQL Injection or virus issue. Well, long story short first - It was a very simple issue of foreign key created with ON UPDATE CASCADE and ON DELETE CASCADE. CASCADE allows deletions or updates of key values to cascade through the tables defined to have foreign key relationships that can be traced back to the table on which the modification is performed. ON DELETE CASCADE specifies that if an attempt is made to delete a row with a key referenced by foreign keys in existing rows in other tables, all rows containing those foreign keys are also deleted. ON UPDATE CASCADE specifies that if an attempt is made to update a key value in a row, where the key value is referenced by foreign keys in existing rows in other tables, all of the foreign key values are also updated to the new value specified for the key. (Reference: BOL) In simple words – due to ON DELETE CASCASE whenever is specified when the data from Table A is deleted and if it is referenced in another table using foreign key it will be deleted as well. In my friend’s case, they had two tables, Products and ProductDetails. They had created foreign key referential integrity of the product id between the table. Now the as fall was up they were updating their catalogue. When they were updating the catalogue they were deleting products which are no more available. As the changes were cascading the corresponding rows were also deleted from another table. This is CORRECT. The matter of the fact, there is no error or anything and SQL Server is behaving how it should be behaving. The problem was in the understanding and inappropriate implementations of business logic. What they needed was Product Master Table, Current Product Catalogue, and Product Order Details History tables. However, they were using only two tables and without proper understanding the relation between them was build using foreign keys. If there were only two table, they should have used soft delete which will not actually delete the record but just hide it from the original product table. This workaround could have got them saved from cascading delete issues. I will be writing a detailed post on the design implications etc in my future post as in above three lines I cannot cover every issue related to designing and it is also not the scope of the blog post. More about designing in future blog posts. Once they learn their mistake, they were happy as there was no intrusion but trust me sometime we are our own enemy and this is a great example of it. In tomorrow’s blog post we will go over their code and workarounds. Feel free to share your opinions, experiences and comments. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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Keep Learning After Your Oracle Training Class is Over - Save 50%!

- by KJones

Written by Amit Kumar, Senior Director Oracle University Digital Training Every training class you take about the latest Oracle application or technology moves you closer to developing the skills you need to succeed. But after class is over, how do you keep up with today’s accelerating pace of innovation? To To keep with the very latest technological advances, you need an ongoing and flexible training solution. One that lets you learn during your own downtime. Knowledge that’s easy to access. Interactive lessons where you connect with experts. A simple way to increase your knowledge, on your own time and at your own pace. The new Oracle Learning Streams is the flexible training solution you're looking for. Continuously Learn with Oracle Learning Streams Over time, Oracle Learning Streams help you develop the depth and breadth of knowledge that will give you the tools to become an expert in your field. By taking advantage of comprehensive and frequently updated information, you can keep learning continuously, at your own pace, when it's convenient for you. Sign up today and get 12 months of unlimited access to: • Hundreds of videos delivered by Oracle experts for fresh and continuous product learning• Live connections with Oracle's top instructors• Robust video search capability to find exactly what you’re looking for• Features that allow you to build your own custom learning queue and request new content Oracle Learning Streams are now available for Oracle Database and Oracle Middleware. Take a moment to preview the content now. For a Limited Time - Save 50% For a limited time, save 50% when you order Oracle Learning Streams with any other Oracle Classroom, Live Virtual Class or Training On Demand course. Now there is no reason for learning to stop when class is over!

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"User-defined type not defined" error in VB 6 under Windows 7

- by sunil.nishad87

I am using Windows 7 and my project is in VB 6.0. I am getting errors while I am executing my program. It shows the error: User-defined type not defined. Here is my code: Private Sub Toolbar1_ButtonClick(ByVal Button As MSComctlLib.Button) Select Case Button.Key Case "trace": Call mntrace_Click Case "snrplot": Call mnSnrplot_Click Case "skyplot": Call mnskyplot_Click Case "nmea": Call mnNmea_Click Case "navigation": Call mnNavigation_Click Case "survey": Call mnSurvey_Click Case "pause/start": Call mnpause_Click Case "save": Call mnsave_Click Case "print": Call mnprint_Click Case "offline": Call mnoffline_Click End Select End Sub How can I solve this error?

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Convert this VB code to C#?

- by Róisín Kerr Lautman

I was wondering if anyone would be able to help me convert the below code to c#? From what I have read it seems to be similar however I am not sure if my 'case' statements are still able to be used? Public Class Form1 Dim dteStart As Date Dim dteFinish As Date Dim span As TimeSpan Public Sub KeyDown(ByVal Sender As System.Object, ByVal e As _ System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown Select Case e.KeyCode Case Keys.Q Label1.BackColor = Color.Green dteStart = Now() Case Keys.W Label2.BackColor = Color.Green Case Keys.E Label3.BackColor = Color.Green Case Keys.R Label4.BackColor = Color.Green dteFinish = Now() span = dteFinish.Subtract(dteStart) Label5.Text = span.ToString End Select End Sub Public Sub KeyUp(ByVal Sender As System.Object, ByVal e As _ System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyUp Select Case e.KeyCode Case Keys.Q Label1.BackColor = Color.Red Case Keys.W Label2.BackColor = Color.Red Case Keys.E Label3.BackColor = Color.Red Case Keys.R Label4.BackColor = Color.Red End Select End Sub End Class

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When is a glue or management class doing too much?

- by jprete

I'm prone to building centralized classes that manage the other classes in my designs. It doesn't store everything itself, but most data requests would go to the "manager" first. While looking at an answer to this question I noticed the term "God Object". Wikipedia lists it as an antipattern, understandably. Where is the line between a legitimate glue class, or module, that passes data and messages from place to place, and a class that is doing too much?

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What is a good use case for static import of methods?

- by Miserable Variable

Just got a review comment that my static import of the method was not a good idea. The static import was of a method from a DA class, which has mostly static methods. So in middle of the business logic I had a da activity that apparently seemed to belong to the current class: import static some.package.DA.*; class BusinessObject { void someMethod() { .... save(this); } } The reviewer was not keen that I change the code and I didn't but I do kind of agree with him. One reason given for not static-importing was it was confusing where the method was defined, it wasn't in the current class and not in any superclass so it too some time to identify its definition (the web based review system does not have clickable links like IDE :-) I don't really think this matters, static-imports are still quite new and soon we will all get used to locating them. But the other reason, the one I agree with, is that an unqualified method call seems to belong to current object and should not jump contexts. But if it really did belong, it would make sense to extend that super class. So, when does it make sense to static import methods? When have you done it? Did/do you like the way the unqualified calls look? EDIT: The popular opinion seems to be that static-import methods if nobody is going to confuse them as methods of the current class. For example methods from java.lang.Math and java.awt.Color. But if abs and getAlpha are not ambiguous I don't see why readEmployee is. As in lot of programming choices, I think this too is a personal preference thing. Thanks for your response guys, I am closing the question.

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Requring static class setter to be called before constructor, bad design?

- by roverred

I have a class, say Foo, and every instance of Foo will need and contain the same List object, myList. Since every class instance will share the same List Object, I thought it would be good to make myList static and use a static function to set myList before the constructor is called. I was wondering if this was bad, because this requires the setter to be called before the constructor? If the person doesn't, the program will crash. Alternative way would be passing myList every time.

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How can I make a div expand on click with only one open at a time?

- by imHavoc

As shown in here: http://www.learningjquery.com/2007/03/accordion-madness. But I need help to edit it so that it will work for my circumstances. Sample HTML <div class="row even"> <div class="info"> <div class="class">CK1</div> <div class="teacher_chinese">??</div> <div class="teacher_english">Teacher Name</div> <div class="assistant_chinese">??</div> <div class="assistant_english">Assistant Name</div> <div class="room">Room 00</div> <div class="book"></div> </div> <div class="chapters"> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=1"><span class="chapter">?</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=2"><span class="chapter">?</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=3"><span class="chapter">?</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=4"><span class="chapter">?</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=5"><span class="chapter">?</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=6"><span class="chapter">?</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=7"><span class="chapter">?</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=8"><span class="chapter">?</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=9"><span class="chapter">?</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=10"><span class="chapter">?</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=11"><span class="chapter">??</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=12"><span class="chapter">??</span></a> <a href="../../curriculum/cantonese/textbook.php?cls=C1&ch=13"><span class="chapter">??</span></a> </div> </div> JQUERY [Work In Progress] $(document).ready(function() { $('div#table_cantonese .chapters').hide(); $('div#table_cantonese .book').click(function() { var $nextDiv = $(this).next(); var $visibleSiblings = $nextDiv.siblings('div:visible'); if ($visibleSiblings.length ) { $visibleSiblings.slideUp('fast', function() { $nextDiv.slideToggle('fast'); }); } else { $nextDiv.slideToggle('fast'); } }); }); So when the end-user click on div.book, div.chapters will expand. And only one div.chapters will be shown at a time. So if a div.chapters is already open, then it will close the open one first before animating the one the user clicked on.

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jquery parent/children selector for counting <li>

- by Kreker

Hi. I have this piece of HTML <div id="fileTreeInviati"> <ul class="php-file-tree"> <li class="pft-directory"> <a href="#" class="" name="101">A006 - SOMETEXT (<span name="contaNew"></span>)</a> <img src="./moduli/home/images/info.png" title="Informazioni Azienda" class="imgInfo"/> <ul style="display: none;"> <li class="pft-file ext-png"> <a href="javascript:getInfoFile('4');" class="" id="4">cut.png</a> </li> <li class="pft-file ext-dll"> <a href="javascript:getInfoFile('27');" class="new" id="27">Safari.dll</a> </li> </ul> </li> <li class="pft-directory"> <a href="#" class="" name="102">A012 - SOMETEXT (<span name="contaNew"></span>)</a> <img src="./moduli/home/images/info.png" title="Informazioni Azienda" class="imgInfo"/> <ul style="display: none;"> <li class="pft-file ext-jpg"> <a href="javascript:getInfoFile('19');" class="new" id="19">04.jpg</a> </li> <li class="pft-file ext-dll"> <a href="javascript:getInfoFile('24');" class="new" id="24">Safari.dll</a> </li> </ul> </li> <li class="pft-directory"> <a href="#" class="" name="103">A014 - SOMETEXT (<span name="contaNew"></span>)</a> <img src="./moduli/home/images/info.png" title="Informazioni Azienda" class="imgInfo"/> <ul style="display: none;"> <li class="pft-file ext-txt"> <a href="javascript:getInfoFile('17');" class="new" id="17">acu.txt</a> </li> <li class="pft-file ext-dll"> <a href="javascript:getInfoFile('22');" class="new" id="22">Safari.dll</a> </li> </ul> </li> </ul> I'm working on a js snippet that cycle through all "a" of the "li" and checks if it has the class "new" if yes increment a counter by one. This counter now has to be printed on the relative "li" "span" 3 level before. So I have the number of the element with the "new" class. The js snippet is this $("#fileTreeInviati .php-file-tree .pft-directory li").each(function(){ $(this).children("a").each(function(i,e){ if ($(e).hasClass("new")){ cont++; console.log($(e).text()); $(this).parent().parent().parent().children("a").children("span").text(cont); } }) cont = 0; }); I think I'm almost there but the counter is always 1. I think there is something mess with .children, maybe it can handle only the first occurrence? Thanks for help

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Can't add Fedora 14 to grub.

- by Dananjaya

Today I installed Fedora 14 in a different partition in the same hard drive as Ubuntu. At the Fedora 14 installation, I chose not to install Boot-loader in the MBR, and instead chose to install it in the Fedora partition itself, which is according to my HD layout /sda3. After the Fedora 14 installation I booted in to Ubuntu and ran sudo update-grub but 'grub.cfg' fails to add Fedora 14 in to the OS list. Here is the output of boot-info script. Boot Info Script 0.60 from 17 May 2011 ============================= Boot Info Summary: =============================== = Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector 1 of the same hard drive for core.img. core.img is at this location and looks for (,msdos1)/boot/grub on this drive. sda1: __________________________________________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: Ubuntu 11.04 Boot files: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img sda2: __________________________________________________________________________ File system: Extended Partition Boot sector type: Unknown Boot sector info: sda5: __________________________________________________________________________ File system: swap Boot sector type: - Boot sector info: sda3: __________________________________________________________________________ File system: ext4 Boot sector type: Grub Legacy Boot sector info: Grub Legacy (v0.97) is installed in the boot sector of sda3 and looks at sector 49897340 on boot drive #1 for the stage2 file. A stage2 file is at this location on /dev/sda. Stage2 looks on partition #3 for /grub/grub.conf. Operating System: Boot files: /grub/menu.lst /grub/grub.conf sda4: __________________________________________________________________________ File system: LVM2_member Boot sector type: - Boot sector info: ============================ Drive/Partition Info: ============================= Drive: sda _____________________________________________________________________ Disk /dev/sda: 40.0 GB, 40020664320 bytes 255 heads, 63 sectors/track, 4865 cylinders, total 78165360 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Partition Boot Start Sector End Sector # of Sectors Id System /dev/sda1 * 2,048 49,865,759 49,863,712 83 Linux /dev/sda2 74,866,686 78,163,967 3,297,282 5 Extended /dev/sda5 74,866,688 78,163,967 3,297,280 82 Linux swap / Solaris /dev/sda3 49,866,752 50,890,751 1,024,000 83 Linux /dev/sda4 50,890,752 74,864,639 23,973,888 8e Linux LVM "blkid" output: ________________________________________________________________ Device UUID TYPE LABEL /dev/sda1 03e2a8da-171f-49e9-b24d-434e66cd1140 ext4 /dev/sda3 dea81d77-a375-4d0e-954e-1829f6b91f10 ext4 /dev/sda4 mzVoj0-GHJu-DJr4-0G2Y-SzZ0-LTfW-F01yf9 LVM2_member /dev/sda5 3e89ba8e-7754-4ee4-aca1-e2a82bffb7a7 swap ================================ Mount points: ================================= Device Mount_Point Type Options /dev/sda1 / ext4 (rw,errors=remount-ro,user_xattr,commit=0) =========================== sda1/boot/grub/grub.cfg: =========================== -------------------------------------------------------------------------------- # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="2" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga insmod video_bochs insmod video_cirrus } insmod part_msdos insmod ext2 set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 03e2a8da-171f-49e9-b24d-434e66cd1140 if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=1024x768 load_video insmod gfxterm fi terminal_output gfxterm insmod part_msdos insmod ext2 set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 03e2a8da-171f-49e9-b24d-434e66cd1140 set locale_dir=($root)/boot/grub/locale set lang=en_US insmod gettext if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray if background_color 44,0,30; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### if [ ${recordfail} != 1 ]; then if [ -e ${prefix}/gfxblacklist.txt ]; then if hwmatch ${prefix}/gfxblacklist.txt 3; then if [ ${match} = 0 ]; then set linux_gfx_mode=keep else set linux_gfx_mode=text fi else set linux_gfx_mode=text fi else set linux_gfx_mode=keep fi else set linux_gfx_mode=text fi export linux_gfx_mode if [ "$linux_gfx_mode" != "text" ]; then load_video; fi menuentry 'Ubuntu, with Linux 2.6.38-8-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod part_msdos insmod ext2 set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 03e2a8da-171f-49e9-b24d-434e66cd1140 linux /boot/vmlinuz-2.6.38-8-generic root=UUID=03e2a8da-171f-49e9-b24d-434e66cd1140 ro quiet splash vt.handoff=7 initrd /boot/initrd.img-2.6.38-8-generic } menuentry 'Ubuntu, with Linux 2.6.38-8-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod part_msdos insmod ext2 set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 03e2a8da-171f-49e9-b24d-434e66cd1140 echo 'Loading Linux 2.6.38-8-generic ...' linux /boot/vmlinuz-2.6.38-8-generic root=UUID=03e2a8da-171f-49e9-b24d-434e66cd1140 ro single echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-2.6.38-8-generic } submenu "Previous Linux versions" { menuentry 'Ubuntu, with Linux 2.6.35-28-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod part_msdos insmod ext2 set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 03e2a8da-171f-49e9-b24d-434e66cd1140 linux /boot/vmlinuz-2.6.35-28-generic root=UUID=03e2a8da-171f-49e9-b24d-434e66cd1140 ro quiet splash vt.handoff=7 initrd /boot/initrd.img-2.6.35-28-generic } menuentry 'Ubuntu, with Linux 2.6.35-28-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod part_msdos insmod ext2 set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 03e2a8da-171f-49e9-b24d-434e66cd1140 echo 'Loading Linux 2.6.35-28-generic ...' linux /boot/vmlinuz-2.6.35-28-generic root=UUID=03e2a8da-171f-49e9-b24d-434e66cd1140 ro single echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-2.6.35-28-generic } menuentry 'Ubuntu, with Linux 2.6.32-21-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod part_msdos insmod ext2 set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 03e2a8da-171f-49e9-b24d-434e66cd1140 linux /boot/vmlinuz-2.6.32-21-generic root=UUID=03e2a8da-171f-49e9-b24d-434e66cd1140 ro quiet splash vt.handoff=7 initrd /boot/initrd.img-2.6.32-21-generic } menuentry 'Ubuntu, with Linux 2.6.32-21-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod part_msdos insmod ext2 set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 03e2a8da-171f-49e9-b24d-434e66cd1140 echo 'Loading Linux 2.6.32-21-generic ...' linux /boot/vmlinuz-2.6.32-21-generic root=UUID=03e2a8da-171f-49e9-b24d-434e66cd1140 ro single echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-2.6.32-21-generic } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod part_msdos insmod ext2 set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 03e2a8da-171f-49e9-b24d-434e66cd1140 linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod part_msdos insmod ext2 set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 03e2a8da-171f-49e9-b24d-434e66cd1140 linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### if [ "x${timeout}" != "x-1" ]; then if keystatus; then if keystatus --shift; then set timeout=-1 else set timeout=0 fi else if sleep --interruptible 3 ; then set timeout=0 fi fi fi ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ### -------------------------------------------------------------------------------- =============================== sda1/etc/fstab: ================================ -------------------------------------------------------------------------------- # /etc/fstab: static file system information. # # Use 'blkid -o value -s UUID' to print the universally unique identifier # for a device; this may be used with UUID= as a more robust way to name # devices that works even if disks are added and removed. See fstab(5). # # proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda1 during installation # Commented out by Dropbox # UUID=03e2a8da-171f-49e9-b24d-434e66cd1140 / ext4 errors=remount-ro 0 1 # swap was on /dev/sda5 during installation UUID=3e89ba8e-7754-4ee4-aca1-e2a82bffb7a7 none swap sw 0 0 UUID=03e2a8da-171f-49e9-b24d-434e66cd1140 / ext4 errors=remount-ro,user_xattr 0 1 -------------------------------------------------------------------------------- =================== sda1: Location of files loaded by Grub: ==================== GiB - GB File Fragment(s) 0.065803528 = 0.070656000 boot/grub/core.img 1 21.263332367 = 22.831329280 boot/grub/grub.cfg 1 0.771381378 = 0.828264448 boot/initrd.img-2.6.31-wl 1 2.054199219 = 2.205679616 boot/initrd.img-2.6.32-21-generic 3 2.893260956 = 3.106615296 boot/initrd.img-2.6.35-28-generic 2 6.833232880 = 7.337127936 boot/initrd.img-2.6.38-8-generic 2 1.772453308 = 1.903157248 boot/vmlinuz-2.6.32-21-generic 2 2.068012238 = 2.220511232 boot/vmlinuz-2.6.35-28-generic 1 5.532531738 = 5.940510720 boot/vmlinuz-2.6.38-8-generic 1 6.833232880 = 7.337127936 initrd.img 2 2.893260956 = 3.106615296 initrd.img.old 2 5.532531738 = 5.940510720 vmlinuz 1 2.068012238 = 2.220511232 vmlinuz.old 1 ============================= sda3/grub/grub.conf: ============================= -------------------------------------------------------------------------------- # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,2) # kernel /vmlinuz-version ro root=/dev/mapper/VolGroup-lv_root # initrd /initrd-[generic-]version.img #boot=/dev/sda3 default=0 timeout=0 splashimage=(hd0,2)/grub/splash.xpm.gz hiddenmenu title Fedora (2.6.35.6-45.fc14.i686) root (hd0,2) kernel /vmlinuz-2.6.35.6-45.fc14.i686 ro root=/dev/mapper/VolGroup-lv_root rd_LVM_LV=VolGroup/lv_root rd_LVM_LV=VolGroup/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet initrd /initramfs-2.6.35.6-45.fc14.i686.img -------------------------------------------------------------------------------- =================== sda3: Location of files loaded by Grub: ==================== GiB - GB File Fragment(s) 23.792903900 = 25.547436032 grub/grub.conf 1 23.792903900 = 25.547436032 grub/menu.lst 1 23.793020248 = 25.547560960 grub/stage2 1 23.817364693 = 25.573700608 initramfs-2.6.35.6-45.fc14.i686.img 2 23.787566185 = 25.541704704 initrd-plymouth.img 1 23.791228294 = 25.545636864 vmlinuz-2.6.35.6-45.fc14.i686 1 ======================== Unknown MBRs/Boot Sectors/etc: ======================== Unknown BootLoader on sda2 00000000 81 71 62 ff a1 94 89 ff 4d 43 3a ff fa f2 ec ff |.qb.....MC:.....| 00000010 fb f6 f1 ff fc f8 f4 ff fc f8 f4 ff fc f8 f4 ff |................| 00000020 5d 56 50 ff a1 94 89 ff 81 70 62 ff 81 70 62 ff |]VP......pb..pb.| 00000030 81 70 62 ff 81 70 62 ff 81 70 62 ff a1 94 89 ff |.pb..pb..pb.....| 00000040 4d 43 3a ff fa f2 ec ff fb f6 f1 ff fc f8 f4 ff |MC:.............| 00000050 fc f8 f4 ff fc f8 f4 ff 5d 56 50 ff a1 94 89 ff |........]VP.....| 00000060 81 70 62 ff 81 70 62 ff 81 70 62 ff 81 70 62 ff |.pb..pb..pb..pb.| 00000070 81 70 62 ff a1 94 89 ff 4d 43 3a ff fa f2 ec ff |.pb.....MC:.....| 00000080 fb f6 f1 ff fc f8 f4 ff fc f8 f4 ff fc f8 f4 ff |................| 00000090 5d 56 50 ff a0 93 89 ff 80 6f 61 ff 80 6f 61 ff |]VP......oa..oa.| 000000a0 80 6f 61 ff 80 6f 61 ff 80 6f 61 ff a0 93 89 ff |.oa..oa..oa.....| 000000b0 4d 43 3a ff fa f2 ed ff fb f6 f2 ff fc f8 f5 ff |MC:.............| 000000c0 fc f8 f5 ff fc f8 f5 ff 5d 56 50 ff 9f 93 88 ff |........]VP.....| 000000d0 7f 6f 60 ff 7f 6f 60 ff 7f 6f 60 ff 7f 6f 60 ff |.o`..o`..o`..o`.| 000000e0 7f 6f 60 ff 9f 93 88 ff 4d 43 3a ff fa f2 ed ff |.o`.....MC:.....| 000000f0 fb f6 f2 ff fc f8 f5 ff fc f8 f5 ff fc f8 f5 ff |................| 00000100 5d 56 50 ff 9f 93 88 ff 7f 6f 60 ff 7f 6f 60 ff |]VP......o`..o`.| 00000110 7f 6f 60 ff 7f 6f 60 ff 7f 6f 60 ff 9f 93 88 ff |.o`..o`..o`.....| 00000120 4d 43 3a ff fa f2 ed ff fb f6 f2 ff fc f8 f5 ff |MC:.............| 00000130 fc f8 f5 ff fc f8 f5 ff 5d 56 50 ff 9e 92 88 ff |........]VP.....| 00000140 7e 6e 60 ff 7e 6e 60 ff 7e 6e 60 ff 7e 6e 60 ff |~n`.~n`.~n`.~n`.| 00000150 7e 6e 60 ff 9e 92 88 ff 4d 43 3a ff fa f2 ed ff |~n`.....MC:.....| 00000160 fb f6 f2 ff fc f8 f5 ff fc f8 f5 ff fc f8 f5 ff |................| 00000170 5d 56 50 ff 9e 92 88 ff 7d 6d 5f ff 7d 6d 5f ff |]VP.....}m_.}m_.| 00000180 7d 6d 5f ff 7d 6d 5f ff 7d 6d 5f ff 9e 92 88 ff |}m_.}m_.}m_.....| 00000190 4d 43 3a ff fa f2 ed ff fb f6 f2 ff fc f8 f5 ff |MC:.............| 000001a0 fc f8 f5 ff fc f8 f5 ff 5d 56 50 ff 9e 92 88 ff |........]VP.....| 000001b0 7d 6d 5f ff 7d 6d 5f ff 7d 6d 5f ff 7d 6d 00 fe |}m_.}m_.}m_.}m..| 000001c0 ff ff 82 fe ff ff 02 00 00 00 00 50 32 00 00 00 |...........P2...| 000001d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 00000200 =============================== StdErr Messages: =============================== unlzma: Decoder error According to this Fedora 14 is visible in sda3. Does anybody know a way to add Fedora 14 to grub.cfg of Ubuntu so I can choose which OS to boot? Thanks in advance.

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Imperative vs. LINQ Performance on WP7

- by Bil Simser

Jesse Liberty had a nice post presenting the concepts around imperative, LINQ and fluent programming to populate a listbox. Check out the post as it’s a great example of some foundational things every .NET programmer should know. I was more interested in what the IL code that would be generated from imperative vs. LINQ was like and what the performance numbers are and how they differ. The code at the instruction level is interesting but not surprising. The imperative example with it’s creating lists and loops weighs in at about 60 instructions. .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } 1: .method private hidebysig instance void ImperativeMethod() cil managed 2: { 3: .maxstack 3 4: .locals init ( 5: [0] class [mscorlib]System.Collections.Generic.IEnumerable`1<int32> someData, 6: [1] class [mscorlib]System.Collections.Generic.List`1<int32> inLoop, 7: [2] int32 n, 8: [3] class [mscorlib]System.Collections.Generic.IEnumerator`1<int32> CS$5$0000, 9: [4] bool CS$4$0001) 10: L_0000: nop 11: L_0001: ldc.i4.1 12: L_0002: ldc.i4.s 50 13: L_0004: call class [mscorlib]System.Collections.Generic.IEnumerable`1<int32> [System.Core]System.Linq.Enumerable::Range(int32, int32) 14: L_0009: stloc.0 15: L_000a: newobj instance void [mscorlib]System.Collections.Generic.List`1<int32>::.ctor() 16: L_000f: stloc.1 17: L_0010: nop 18: L_0011: ldloc.0 19: L_0012: callvirt instance class [mscorlib]System.Collections.Generic.IEnumerator`1<!0> [mscorlib]System.Collections.Generic.IEnumerable`1<int32>::GetEnumerator() 20: L_0017: stloc.3 21: L_0018: br.s L_003a 22: L_001a: ldloc.3 23: L_001b: callvirt instance !0 [mscorlib]System.Collections.Generic.IEnumerator`1<int32>::get_Current() 24: L_0020: stloc.2 25: L_0021: nop 26: L_0022: ldloc.2 27: L_0023: ldc.i4.5 28: L_0024: cgt 29: L_0026: ldc.i4.0 30: L_0027: ceq 31: L_0029: stloc.s CS$4$0001 32: L_002b: ldloc.s CS$4$0001 33: L_002d: brtrue.s L_0039 34: L_002f: ldloc.1 35: L_0030: ldloc.2 36: L_0031: ldloc.2 37: L_0032: mul 38: L_0033: callvirt instance void [mscorlib]System.Collections.Generic.List`1<int32>::Add(!0) 39: L_0038: nop 40: L_0039: nop 41: L_003a: ldloc.3 42: L_003b: callvirt instance bool [mscorlib]System.Collections.IEnumerator::MoveNext() 43: L_0040: stloc.s CS$4$0001 44: L_0042: ldloc.s CS$4$0001 45: L_0044: brtrue.s L_001a 46: L_0046: leave.s L_005a 47: L_0048: ldloc.3 48: L_0049: ldnull 49: L_004a: ceq 50: L_004c: stloc.s CS$4$0001 51: L_004e: ldloc.s CS$4$0001 52: L_0050: brtrue.s L_0059 53: L_0052: ldloc.3 54: L_0053: callvirt instance void [mscorlib]System.IDisposable::Dispose() 55: L_0058: nop 56: L_0059: endfinally 57: L_005a: nop 58: L_005b: ldarg.0 59: L_005c: ldfld class [System.Windows]System.Windows.Controls.ListBox PerfTest.MainPage::LB1 60: L_0061: ldloc.1 61: L_0062: callvirt instance void [System.Windows]System.Windows.Controls.ItemsControl::set_ItemsSource(class [mscorlib]System.Collections.IEnumerable) 62: L_0067: nop 63: L_0068: ret 64: .try L_0018 to L_0048 finally handler L_0048 to L_005a 65: } 66: 67: Compare that to the IL generated for the LINQ version which has about half of the instructions and just gets the job done, no fluff. .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } 1: .method private hidebysig instance void LINQMethod() cil managed 2: { 3: .maxstack 4 4: .locals init ( 5: [0] class [mscorlib]System.Collections.Generic.IEnumerable`1<int32> someData, 6: [1] class [mscorlib]System.Collections.Generic.IEnumerable`1<int32> queryResult) 7: L_0000: nop 8: L_0001: ldc.i4.1 9: L_0002: ldc.i4.s 50 10: L_0004: call class [mscorlib]System.Collections.Generic.IEnumerable`1<int32> [System.Core]System.Linq.Enumerable::Range(int32, int32) 11: L_0009: stloc.0 12: L_000a: ldloc.0 13: L_000b: ldsfld class [System.Core]System.Func`2<int32, bool> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate6 14: L_0010: brtrue.s L_0025 15: L_0012: ldnull 16: L_0013: ldftn bool PerfTest.MainPage::<LINQProgramming>b__4(int32) 17: L_0019: newobj instance void [System.Core]System.Func`2<int32, bool>::.ctor(object, native int) 18: L_001e: stsfld class [System.Core]System.Func`2<int32, bool> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate6 19: L_0023: br.s L_0025 20: L_0025: ldsfld class [System.Core]System.Func`2<int32, bool> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate6 21: L_002a: call class [mscorlib]System.Collections.Generic.IEnumerable`1<!!0> [System.Core]System.Linq.Enumerable::Where<int32>(class [mscorlib]System.Collections.Generic.IEnumerable`1<!!0>, class [System.Core]System.Func`2<!!0, bool>) 22: L_002f: ldsfld class [System.Core]System.Func`2<int32, int32> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate7 23: L_0034: brtrue.s L_0049 24: L_0036: ldnull 25: L_0037: ldftn int32 PerfTest.MainPage::<LINQProgramming>b__5(int32) 26: L_003d: newobj instance void [System.Core]System.Func`2<int32, int32>::.ctor(object, native int) 27: L_0042: stsfld class [System.Core]System.Func`2<int32, int32> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate7 28: L_0047: br.s L_0049 29: L_0049: ldsfld class [System.Core]System.Func`2<int32, int32> PerfTest.MainPage::CS$<>9__CachedAnonymousMethodDelegate7 30: L_004e: call class [mscorlib]System.Collections.Generic.IEnumerable`1<!!1> [System.Core]System.Linq.Enumerable::Select<int32, int32>(class [mscorlib]System.Collections.Generic.IEnumerable`1<!!0>, class [System.Core]System.Func`2<!!0, !!1>) 31: L_0053: stloc.1 32: L_0054: ldarg.0 33: L_0055: ldfld class [System.Windows]System.Windows.Controls.ListBox PerfTest.MainPage::LB2 34: L_005a: ldloc.1 35: L_005b: callvirt instance void [System.Windows]System.Windows.Controls.ItemsControl::set_ItemsSource(class [mscorlib]System.Collections.IEnumerable) 36: L_0060: nop 37: L_0061: ret 38: } Again, not surprising here but a good indicator that you should consider using LINQ where possible. In fact if you have ReSharper installed you’ll see a squiggly (technical term) in the imperative code that says “Hey Dude, I can convert this to LINQ if you want to be c00L!” (or something like that, it’s the 2010 geek version of Clippy). What about the fluent version? As Jon correctly pointed out in the comments, when you compare the IL for the LINQ code and the IL for the fluent code it’s the same. LINQ and the fluent interface are just syntactical sugar so you decide what you’re most comfortable with. At the end of the day they’re both the same. Now onto the numbers. Again I expected the imperative version to be better performing than the LINQ version (before I saw the IL that was generated). Call it womanly instinct. A gut feel. Whatever. Some of the numbers are interesting though. For Jesse’s example of 50 items, the numbers were interesting. The imperative sample clocked in at 7ms while the LINQ version completed in 4. As the number of items went up, the elapsed time didn’t necessarily climb exponentially. At 500 items they were pretty much the same and the results were similar up to about 50,000 items. After that I tried 500,000 items where the gap widened but not by much (2.2 seconds for imperative, 2.3 for LINQ). It wasn’t until I tried 5,000,000 items where things were noticeable. Imperative filled the list in 20 seconds while LINQ took 8 seconds longer (although personally I wouldn’t suggest you put 5 million items in a list unless you want your users showing up at your door with torches and pitchforks). Here’s the table with the full results. Method/Items 50 500 5,000 50,000 500,000 5,000,000 Imperative 7ms 7ms 38ms 223ms 2230ms 20974ms LINQ/Fluent 4ms 6ms 41ms 240ms 2310ms 28731ms Like I said, at the end of the day it’s not a huge difference and you really don’t want your users waiting around for 30 seconds on a mobile device filling lists. In fact if Windows Phone 7 detects you’re taking more than 10 seconds to do any one thing, it considers the app hung and shuts it down. The results here are for Windows Phone 7 but frankly they're the same for desktop and web apps so feel free to apply it generally. From a programming perspective, choose what you like. Some LINQ statements can get pretty hairy so I usually fall back with my simple mind and write it imperatively. If you really want to impress your friends, write it old school then let ReSharper do the hard work for! Happy programming!

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Sniffing out SQL Code Smells: Inconsistent use of Symbolic names and Datatypes

- by Phil Factor

It is an awkward feeling. You’ve just delivered a database application that seems to be working fine in production, and you just run a few checks on it. You discover that there is a potential bug that, out of sheer good chance, hasn’t kicked in to produce an error; but it lurks, like a smoking bomb. Worse, maybe you find that the bug has started its evil work of corrupting the data, but in ways that nobody has, so far detected. You investigate, and find the damage. You are somehow going to have to repair it. Yes, it still very occasionally happens to me. It is not a nice feeling, and I do anything I can to prevent it happening. That’s why I’m interested in SQL code smells. SQL Code Smells aren’t necessarily bad practices, but just show you where to focus your attention when checking an application. Sometimes with databases the bugs can be subtle. SQL is rather like HTML: the language does its best to try to carry out your wishes, rather than to be picky about your bugs. Most of the time, this is a great benefit, but not always. One particular place where this can be detrimental is where you have implicit conversion between different data types. Most of the time it is completely harmless but we’re concerned about the occasional time it isn’t. Let’s give an example: String truncation. Let’s give another even more frightening one, rounding errors on assignment to a number of different precision. Each requires a blog-post to explain in detail and I’m not now going to try. Just remember that it is not always a good idea to assign data to variables, parameters or even columns when they aren’t the same datatype, especially if you are relying on implicit conversion to work its magic.For details of the problem and the consequences, see here: SR0014: Data loss might occur when casting from {Type1} to {Type2} . For any experienced Database Developer, this is a more frightening read than a Vampire Story. This is why one of the SQL Code Smells that makes me edgy, in my own or other peoples’ code, is to see parameters, variables and columns that have the same names and different datatypes. Whereas quite a lot of this is perfectly normal and natural, you need to check in case one of two things have gone wrong. Either sloppy naming, or mixed datatypes. Sure it is hard to remember whether you decided that the length of a log entry was 80 or 100 characters long, or the precision of a number. That is why a little check like this I’m going to show you is excellent for tidying up your code before you check it back into source Control! 1/ Checking Parameters only If you were just going to check parameters, you might just do this. It simply groups all the parameters, either input or output, of all the routines (e.g. stored procedures or functions) by their name and checks to see, in the HAVING clause, whether their data types are all the same. If not, it lists all the examples and their origin (the routine) Even this little check can occasionally be scarily revealing. ;WITH userParameter AS ( SELECT c.NAME AS ParameterName, OBJECT_SCHEMA_NAME(c.object_ID) + '.' + OBJECT_NAME(c.object_ID) AS ObjectName, t.name + ' ' + CASE --we may have to put in the length WHEN t.name IN ('char', 'varchar', 'nchar', 'nvarchar') THEN '(' + CASE WHEN c.max_length = -1 THEN 'MAX' ELSE CONVERT(VARCHAR(4), CASE WHEN t.name IN ('nchar', 'nvarchar') THEN c.max_length / 2 ELSE c.max_length END) END + ')' WHEN t.name IN ('decimal', 'numeric') THEN '(' + CONVERT(VARCHAR(4), c.precision) + ',' + CONVERT(VARCHAR(4), c.Scale) + ')' ELSE '' END --we've done with putting in the length + CASE WHEN XML_collection_ID <> 0 THEN --deal with object schema names '(' + CASE WHEN is_XML_Document = 1 THEN 'DOCUMENT ' ELSE 'CONTENT ' END + COALESCE( (SELECT QUOTENAME(ss.name) + '.' + QUOTENAME(sc.name) FROM sys.xml_schema_collections sc INNER JOIN Sys.Schemas ss ON sc.schema_ID = ss.schema_ID WHERE sc.xml_collection_ID = c.XML_collection_ID),'NULL') + ')' ELSE '' END AS [DataType] FROM sys.parameters c INNER JOIN sys.types t ON c.user_Type_ID = t.user_Type_ID WHERE OBJECT_SCHEMA_NAME(c.object_ID) <> 'sys' AND parameter_id>0)SELECT CONVERT(CHAR(80),objectName+'.'+ParameterName),DataType FROM UserParameterWHERE ParameterName IN (SELECT ParameterName FROM UserParameter GROUP BY ParameterName HAVING MIN(Datatype)<>MAX(DataType))ORDER BY ParameterName so, in a very small example here, we have a @ClosingDelimiter variable that is only CHAR(1) when, by the looks of it, it should be up to ten characters long, or even worse, a function that should be a char(1) and seems to let in a string of ten characters. Worth investigating. Then we have a @Comment variable that can't decide whether it is a VARCHAR(2000) or a VARCHAR(MAX) 2/ Columns and Parameters Actually, once we’ve cleared up the mess we’ve made of our parameter-naming in the database we’re inspecting, we’re going to be more interested in listing both columns and parameters. We can do this by modifying the routine to list columns as well as parameters. Because of the slight complexity of creating the string version of the datatypes, we will create a fake table of both columns and parameters so that they can both be processed the same way. After all, we want the datatypes to match Unfortunately, parameters do not expose all the attributes we are interested in, such as whether they are nullable (oh yes, subtle bugs happen if this isn’t consistent for a datatype). We’ll have to leave them out for this check. Voila! A slight modification of the first routine ;WITH userObject AS ( SELECT Name AS DataName,--the actual name of the parameter or column ('@' removed) --and the qualified object name of the routine OBJECT_SCHEMA_NAME(ObjectID) + '.' + OBJECT_NAME(ObjectID) AS ObjectName, --now the harder bit: the definition of the datatype. TypeName + ' ' + CASE --we may have to put in the length. e.g. CHAR (10) WHEN TypeName IN ('char', 'varchar', 'nchar', 'nvarchar') THEN '(' + CASE WHEN MaxLength = -1 THEN 'MAX' ELSE CONVERT(VARCHAR(4), CASE WHEN TypeName IN ('nchar', 'nvarchar') THEN MaxLength / 2 ELSE MaxLength END) END + ')' WHEN TypeName IN ('decimal', 'numeric')--a BCD number! THEN '(' + CONVERT(VARCHAR(4), Precision) + ',' + CONVERT(VARCHAR(4), Scale) + ')' ELSE '' END --we've done with putting in the length + CASE WHEN XML_collection_ID <> 0 --tush tush. XML THEN --deal with object schema names '(' + CASE WHEN is_XML_Document = 1 THEN 'DOCUMENT ' ELSE 'CONTENT ' END + COALESCE( (SELECT TOP 1 QUOTENAME(ss.name) + '.' + QUOTENAME(sc.Name) FROM sys.xml_schema_collections sc INNER JOIN Sys.Schemas ss ON sc.schema_ID = ss.schema_ID WHERE sc.xml_collection_ID = XML_collection_ID),'NULL') + ')' ELSE '' END AS [DataType], DataObjectType FROM (Select t.name AS TypeName, REPLACE(c.name,'@','') AS Name, c.max_length AS MaxLength, c.precision AS [Precision], c.scale AS [Scale], c.[Object_id] AS ObjectID, XML_collection_ID, is_XML_Document,'P' AS DataobjectType FROM sys.parameters c INNER JOIN sys.types t ON c.user_Type_ID = t.user_Type_ID AND parameter_id>0 UNION all Select t.name AS TypeName, c.name AS Name, c.max_length AS MaxLength, c.precision AS [Precision], c.scale AS [Scale], c.[Object_id] AS ObjectID, XML_collection_ID,is_XML_Document, 'C' AS DataobjectType FROM sys.columns c INNER JOIN sys.types t ON c.user_Type_ID = t.user_Type_ID WHERE OBJECT_SCHEMA_NAME(c.object_ID) <> 'sys' )f)SELECT CONVERT(CHAR(80),objectName+'.' + CASE WHEN DataobjectType ='P' THEN '@' ELSE '' END + DataName),DataType FROM UserObjectWHERE DataName IN (SELECT DataName FROM UserObject GROUP BY DataName HAVING MIN(Datatype)<>MAX(DataType))ORDER BY DataName Hmm. I can tell you I found quite a few minor issues with the various tabases I tested this on, and found some potential bugs that really leap out at you from the results. Here is the start of the result for AdventureWorks. Yes, AccountNumber is, for some reason, a Varchar(10) in the Customer table. Hmm. odd. Why is a city fifty characters long in that view? The idea of the description of a colour being 256 characters long seems over-ambitious. Go down the list and you'll spot other mistakes. There are no bugs, but just mess. We started out with a listing to examine parameters, then we mixed parameters and columns. Our last listing is for a slightly more in-depth look at table columns. You’ll notice that we’ve delibarately removed the indication of whether a column is persisted, or is an identity column because that gives us false positives for our code smells. If you just want to browse your metadata for other reasons (and it can quite help in some circumstances) then uncomment them! ;WITH userColumns AS ( SELECT c.NAME AS columnName, OBJECT_SCHEMA_NAME(c.object_ID) + '.' + OBJECT_NAME(c.object_ID) AS ObjectName, REPLACE(t.name + ' ' + CASE WHEN is_computed = 1 THEN ' AS ' + --do DDL for a computed column (SELECT definition FROM sys.computed_columns cc WHERE cc.object_id = c.object_id AND cc.column_ID = c.column_ID) --we may have to put in the length WHEN t.Name IN ('char', 'varchar', 'nchar', 'nvarchar') THEN '(' + CASE WHEN c.Max_Length = -1 THEN 'MAX' ELSE CONVERT(VARCHAR(4), CASE WHEN t.Name IN ('nchar', 'nvarchar') THEN c.Max_Length / 2 ELSE c.Max_Length END) END + ')' WHEN t.name IN ('decimal', 'numeric') THEN '(' + CONVERT(VARCHAR(4), c.precision) + ',' + CONVERT(VARCHAR(4), c.Scale) + ')' ELSE '' END + CASE WHEN c.is_rowguidcol = 1 THEN ' ROWGUIDCOL' ELSE '' END + CASE WHEN XML_collection_ID <> 0 THEN --deal with object schema names '(' + CASE WHEN is_XML_Document = 1 THEN 'DOCUMENT ' ELSE 'CONTENT ' END + COALESCE((SELECT QUOTENAME(ss.name) + '.' + QUOTENAME(sc.name) FROM sys.xml_schema_collections sc INNER JOIN Sys.Schemas ss ON sc.schema_ID = ss.schema_ID WHERE sc.xml_collection_ID = c.XML_collection_ID), 'NULL') + ')' ELSE '' END + CASE WHEN is_identity = 1 THEN CASE WHEN OBJECTPROPERTY(object_id, 'IsUserTable') = 1 AND COLUMNPROPERTY(object_id, c.name, 'IsIDNotForRepl') = 0 AND OBJECTPROPERTY(object_id, 'IsMSShipped') = 0 THEN '' ELSE ' NOT FOR REPLICATION ' END ELSE '' END + CASE WHEN c.is_nullable = 0 THEN ' NOT NULL' ELSE ' NULL' END + CASE WHEN c.default_object_id <> 0 THEN ' DEFAULT ' + object_Definition(c.default_object_id) ELSE '' END + CASE WHEN c.collation_name IS NULL THEN '' WHEN c.collation_name <> (SELECT collation_name FROM sys.databases WHERE name = DB_NAME()) COLLATE Latin1_General_CI_AS THEN COALESCE(' COLLATE ' + c.collation_name, '') ELSE '' END,' ',' ') AS [DataType]FROM sys.columns c INNER JOIN sys.types t ON c.user_Type_ID = t.user_Type_ID WHERE OBJECT_SCHEMA_NAME(c.object_ID) <> 'sys')SELECT CONVERT(CHAR(80),objectName+'.'+columnName),DataType FROM UserColumnsWHERE columnName IN (SELECT columnName FROM UserColumns GROUP BY columnName HAVING MIN(Datatype)<>MAX(DataType))ORDER BY columnName If you take a look down the results against Adventureworks, you'll see once again that there are things to investigate, mostly, in the illustration, discrepancies between null and non-null datatypes So I here you ask, what about temporary variables within routines? If ever there was a source of elusive bugs, you'll find it there. Sadly, these temporary variables are not stored in the metadata so we'll have to find a more subtle way of flushing these out, and that will, I'm afraid, have to wait!

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Blank Screen at boot Ubuntu 12.04 - nvidia-current - Macbook Air 3,2

- by soulnafein

I've installed nvidia-current using the Additional Drivers application in Ubuntu 12.04. I need those drivers so I can use accelerated WebGL. After installing the drivers, and rebooting X fails to start and I have a frozen system/dark screen. Below is the content of Xorg.0.log How can I fix this problem? [ 4.666] X.Org X Server 1.11.3 Release Date: 2011-12-16 [ 4.666] X Protocol Version 11, Revision 0 [ 4.666] Build Operating System: Linux 2.6.42-23-generic x86_64 Ubuntu [ 4.666] Current Operating System: Linux david-macbook-air 3.2.0-34-generic #53-Ubuntu SMP Thu Nov 15 10:48:16 UTC 2012 x86_64 [ 4.666] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-34-generic root=UUID=b3d5ae2a-72af-4ef9-b775-0d40b5f80f9b ro quiet splash vt.handoff=7 [ 4.666] Build Date: 29 August 2012 12:12:33AM [ 4.666] xorg-server 2:1.11.4-0ubuntu10.8 (For technical support please see http://www.ubuntu.com/support) [ 4.666] Current version of pixman: 0.24.4 [ 4.666] Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. [ 4.666] Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. [ 4.666] (==) Log file: "/var/log/Xorg.0.log", Time: Thu Dec 13 10:18:02 2012 [ 4.668] (==) Using system config directory "/usr/share/X11/xorg.conf.d" [ 4.668] (==) No Layout section. Using the first Screen section. [ 4.668] (==) No screen section available. Using defaults. [ 4.668] (**) |-->Screen "Default Screen Section" (0) [ 4.668] (**) | |-->Monitor "<default monitor>" [ 4.668] (==) No monitor specified for screen "Default Screen Section". Using a default monitor configuration. [ 4.668] (==) Automatically adding devices [ 4.668] (==) Automatically enabling devices [ 4.668] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist. [ 4.668] Entry deleted from font path. [ 4.668] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist. [ 4.668] Entry deleted from font path. [ 4.669] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist. [ 4.669] Entry deleted from font path. [ 4.669] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist. [ 4.669] Entry deleted from font path. [ 4.669] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist. [ 4.669] Entry deleted from font path. [ 4.669] (WW) The directory "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType" does not exist. [ 4.669] Entry deleted from font path. [ 4.669] (==) FontPath set to: /usr/share/fonts/X11/misc, /usr/share/fonts/X11/Type1, built-ins [ 4.669] (==) ModulePath set to "/usr/lib/x86_64-linux-gnu/xorg/extra-modules,/usr/lib/xorg/extra-modules,/usr/lib/xorg/modules" [ 4.669] (II) The server relies on udev to provide the list of input devices. If no devices become available, reconfigure udev or disable AutoAddDevices. [ 4.669] (II) Loader magic: 0x7f6222467b00 [ 4.669] (II) Module ABI versions: [ 4.669] X.Org ANSI C Emulation: 0.4 [ 4.669] X.Org Video Driver: 11.0 [ 4.669] X.Org XInput driver : 16.0 [ 4.669] X.Org Server Extension : 6.0 [ 4.670] (--) PCI:*(0:2:0:0) 10de:08a3:106b:00d3 rev 162, Mem @ 0x92000000/16777216, 0x80000000/268435456, 0x90000000/33554432, I/O @ 0x00001000/128, BIOS @ 0x????????/131072 [ 4.670] (II) Open ACPI successful (/var/run/acpid.socket) [ 4.670] (II) LoadModule: "extmod" [ 4.671] (II) Loading /usr/lib/xorg/modules/extensions/libextmod.so [ 4.671] (II) Module extmod: vendor="X.Org Foundation" [ 4.671] compiled for 1.11.3, module version = 1.0.0 [ 4.671] Module class: X.Org Server Extension [ 4.671] ABI class: X.Org Server Extension, version 6.0 [ 4.671] (II) Loading extension MIT-SCREEN-SAVER [ 4.671] (II) Loading extension XFree86-VidModeExtension [ 4.671] (II) Loading extension XFree86-DGA [ 4.671] (II) Loading extension DPMS [ 4.671] (II) Loading extension XVideo [ 4.671] (II) Loading extension XVideo-MotionCompensation [ 4.671] (II) Loading extension X-Resource [ 4.671] (II) LoadModule: "dbe" [ 4.671] (II) Loading /usr/lib/xorg/modules/extensions/libdbe.so [ 4.671] (II) Module dbe: vendor="X.Org Foundation" [ 4.671] compiled for 1.11.3, module version = 1.0.0 [ 4.671] Module class: X.Org Server Extension [ 4.671] ABI class: X.Org Server Extension, version 6.0 [ 4.671] (II) Loading extension DOUBLE-BUFFER [ 4.671] (II) LoadModule: "glx" [ 4.671] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/libglx.so [ 4.869] (II) Module glx: vendor="NVIDIA Corporation" [ 4.869] compiled for 4.0.2, module version = 1.0.0 [ 4.869] Module class: X.Org Server Extension [ 4.869] (II) NVIDIA GLX Module 295.40 Thu Apr 5 21:57:38 PDT 2012 [ 4.869] (II) Loading extension GLX [ 4.869] (II) LoadModule: "record" [ 4.870] (II) Loading /usr/lib/xorg/modules/extensions/librecord.so [ 4.870] (II) Module record: vendor="X.Org Foundation" [ 4.870] compiled for 1.11.3, module version = 1.13.0 [ 4.870] Module class: X.Org Server Extension [ 4.870] ABI class: X.Org Server Extension, version 6.0 [ 4.870] (II) Loading extension RECORD [ 4.870] (II) LoadModule: "dri" [ 4.870] (II) Loading /usr/lib/xorg/modules/extensions/libdri.so [ 4.870] (II) Module dri: vendor="X.Org Foundation" [ 4.870] compiled for 1.11.3, module version = 1.0.0 [ 4.870] ABI class: X.Org Server Extension, version 6.0 [ 4.870] (II) Loading extension XFree86-DRI [ 4.870] (II) LoadModule: "dri2" [ 4.871] (II) Loading /usr/lib/xorg/modules/extensions/libdri2.so [ 4.871] (II) Module dri2: vendor="X.Org Foundation" [ 4.871] compiled for 1.11.3, module version = 1.2.0 [ 4.871] ABI class: X.Org Server Extension, version 6.0 [ 4.871] (II) Loading extension DRI2 [ 4.871] (==) Matched nvidia as autoconfigured driver 0 [ 4.871] (==) Matched nouveau as autoconfigured driver 1 [ 4.871] (==) Matched nv as autoconfigured driver 2 [ 4.871] (==) Matched vesa as autoconfigured driver 3 [ 4.871] (==) Matched fbdev as autoconfigured driver 4 [ 4.871] (==) Assigned the driver to the xf86ConfigLayout [ 4.871] (II) LoadModule: "nvidia" [ 4.871] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so [ 4.887] (II) Module nvidia: vendor="NVIDIA Corporation" [ 4.887] compiled for 4.0.2, module version = 1.0.0 [ 4.887] Module class: X.Org Video Driver [ 4.892] (II) LoadModule: "nouveau" [ 4.894] (II) Loading /usr/lib/xorg/modules/drivers/nouveau_drv.so [ 4.894] (II) Module nouveau: vendor="X.Org Foundation" [ 4.894] compiled for 1.11.3, module version = 1.0.2 [ 4.894] Module class: X.Org Video Driver [ 4.894] ABI class: X.Org Video Driver, version 11.0 [ 4.894] (II) LoadModule: "nv" [ 4.895] (WW) Warning, couldn't open module nv [ 4.895] (II) UnloadModule: "nv" [ 4.895] (II) Unloading nv [ 4.895] (EE) Failed to load module "nv" (module does not exist, 0) [ 4.895] (II) LoadModule: "vesa" [ 4.895] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so [ 4.896] (II) Module vesa: vendor="X.Org Foundation" [ 4.896] compiled for 1.11.3, module version = 2.3.0 [ 4.896] Module class: X.Org Video Driver [ 4.896] ABI class: X.Org Video Driver, version 11.0 [ 4.896] (II) LoadModule: "fbdev" [ 4.896] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so [ 4.896] (II) Module fbdev: vendor="X.Org Foundation" [ 4.896] compiled for 1.11.3, module version = 0.4.2 [ 4.896] ABI class: X.Org Video Driver, version 11.0 [ 4.896] (==) Matched nvidia as autoconfigured driver 0 [ 4.896] (==) Matched nouveau as autoconfigured driver 1 [ 4.896] (==) Matched nv as autoconfigured driver 2 [ 4.896] (==) Matched vesa as autoconfigured driver 3 [ 4.896] (==) Matched fbdev as autoconfigured driver 4 [ 4.896] (==) Assigned the driver to the xf86ConfigLayout [ 4.896] (II) LoadModule: "nvidia" [ 4.896] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so [ 4.896] (II) Module nvidia: vendor="NVIDIA Corporation" [ 4.896] compiled for 4.0.2, module version = 1.0.0 [ 4.896] Module class: X.Org Video Driver [ 4.896] (II) UnloadModule: "nvidia" [ 4.896] (II) Unloading nvidia [ 4.896] (II) Failed to load module "nvidia" (already loaded, 32610) [ 4.896] (II) LoadModule: "nouveau" [ 4.897] (II) Loading /usr/lib/xorg/modules/drivers/nouveau_drv.so [ 4.897] (II) Module nouveau: vendor="X.Org Foundation" [ 4.897] compiled for 1.11.3, module version = 1.0.2 [ 4.897] Module class: X.Org Video Driver [ 4.897] ABI class: X.Org Video Driver, version 11.0 [ 4.897] (II) UnloadModule: "nouveau" [ 4.897] (II) Unloading nouveau [ 4.897] (II) Failed to load module "nouveau" (already loaded, 32610) [ 4.897] (II) LoadModule: "nv" [ 4.897] (WW) Warning, couldn't open module nv [ 4.897] (II) UnloadModule: "nv" [ 4.897] (II) Unloading nv [ 4.897] (EE) Failed to load module "nv" (module does not exist, 0) [ 4.897] (II) LoadModule: "vesa" [ 4.898] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so [ 4.898] (II) Module vesa: vendor="X.Org Foundation" [ 4.898] compiled for 1.11.3, module version = 2.3.0 [ 4.898] Module class: X.Org Video Driver [ 4.898] ABI class: X.Org Video Driver, version 11.0 [ 4.898] (II) UnloadModule: "vesa" [ 4.898] (II) Unloading vesa [ 4.898] (II) Failed to load module "vesa" (already loaded, 0) [ 4.898] (II) LoadModule: "fbdev" [ 4.898] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so [ 4.898] (II) Module fbdev: vendor="X.Org Foundation" [ 4.898] compiled for 1.11.3, module version = 0.4.2 [ 4.898] ABI class: X.Org Video Driver, version 11.0 [ 4.898] (II) UnloadModule: "fbdev" [ 4.898] (II) Unloading fbdev [ 4.899] (II) Failed to load module "fbdev" (already loaded, 0) [ 4.899] (II) NVIDIA dlloader X Driver 295.40 Thu Apr 5 21:38:35 PDT 2012 [ 4.899] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs [ 4.899] (II) NOUVEAU driver Date: Wed Sep 12 13:42:43 2012 +0200 [ 4.899] (II) NOUVEAU driver for NVIDIA chipset families : [ 4.899] RIVA TNT (NV04) [ 4.899] RIVA TNT2 (NV05) [ 4.899] GeForce 256 (NV10) [ 4.899] GeForce 2 (NV11, NV15) [ 4.899] GeForce 4MX (NV17, NV18) [ 4.899] GeForce 3 (NV20) [ 4.900] GeForce 4Ti (NV25, NV28) [ 4.900] GeForce FX (NV3x) [ 4.900] GeForce 6 (NV4x) [ 4.900] GeForce 7 (G7x) [ 4.900] GeForce 8 (G8x) [ 4.900] GeForce GTX 200 (NVA0) [ 4.900] GeForce GTX 400 (NVC0) [ 4.900] (II) VESA: driver for VESA chipsets: vesa [ 4.900] (II) FBDEV: driver for framebuffer: fbdev [ 4.900] (++) using VT number 7 [ 4.902] (II) Loading sub module "fb" [ 4.902] (II) LoadModule: "fb" [ 4.902] (II) Loading /usr/lib/xorg/modules/libfb.so [ 4.902] (II) Module fb: vendor="X.Org Foundation" [ 4.902] compiled for 1.11.3, module version = 1.0.0 [ 4.902] ABI class: X.Org ANSI C Emulation, version 0.4 [ 4.902] (II) Loading sub module "wfb" [ 4.902] (II) LoadModule: "wfb" [ 4.903] (II) Loading /usr/lib/xorg/modules/libwfb.so [ 4.905] (II) Module wfb: vendor="X.Org Foundation" [ 4.905] compiled for 1.11.3, module version = 1.0.0 [ 4.905] ABI class: X.Org ANSI C Emulation, version 0.4 [ 4.905] (II) Loading sub module "ramdac" [ 4.905] (II) LoadModule: "ramdac" [ 4.905] (II) Module "ramdac" already built-in [ 4.907] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so [ 4.907] (II) Loading /usr/lib/xorg/modules/libwfb.so [ 4.907] (II) Loading /usr/lib/xorg/modules/libfb.so [ 4.912] (WW) Falling back to old probe method for vesa [ 4.912] (WW) Falling back to old probe method for fbdev [ 4.912] (II) Loading sub module "fbdevhw" [ 4.912] (II) LoadModule: "fbdevhw" [ 4.912] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so [ 4.912] (II) Module fbdevhw: vendor="X.Org Foundation" [ 4.912] compiled for 1.11.3, module version = 0.0.2 [ 4.912] ABI class: X.Org Video Driver, version 11.0 [ 4.912] (II) NVIDIA(0): Creating default Display subsection in Screen section "Default Screen Section" for depth/fbbpp 24/32 [ 4.912] (==) NVIDIA(0): Depth 24, (==) framebuffer bpp 32 [ 4.912] (==) NVIDIA(0): RGB weight 888 [ 4.912] (==) NVIDIA(0): Default visual is TrueColor [ 4.912] (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0) [ 4.912] (**) NVIDIA(0): Enabling 2D acceleration [ 5.442] (EE) NVIDIA(0): Failed to initialize the display subsystem for the NVIDIA [ 5.442] (EE) NVIDIA(0): graphics device! [ 5.442] (EE) NVIDIA(0): Failed to get supported display device(s) [ 5.442] (EE) NVIDIA(0): Failed to initialize dac HAL [ 5.442] (II) UnloadModule: "nvidia" [ 5.442] (II) Unloading nvidia [ 5.442] (II) UnloadModule: "wfb" [ 5.442] (II) Unloading wfb [ 5.442] (II) UnloadModule: "fb" [ 5.443] (II) Unloading fb [ 5.443] (EE) Screen(s) found, but none have a usable configuration. [ 5.443] Fatal server error: [ 5.443] no screens found [ 5.443] Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 5.443] Please also check the log file at "/var/log/Xorg.0.log" for additional information. [ 5.443] [ 5.447] ddxSigGiveUp: Closing log [ 5.447] Server terminated with error (1). Closing log file.

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Trying to convert simple midlet application to Android application but running into problems.

- by chobo2

Hi I am trying to do some threading in Android so I took an old threading assignment I had done fora midlet and took out the midlet code and replaced it with android code(such as textview). package com.assignment1; import android.app.Activity; import android.os.Bundle; import android.widget.TextView; public class Threading extends Activity { private TextView tortose; private TextView hare; private Thread hareThread; private Thread torotoseThread; private int num = 0; private int num2 = 0; public Threading() { } /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tortose = (TextView) findViewById(R.id.TextView01); hare = (TextView) findViewById(R.id.TextView02); Hare newHare = new Hare(); hareThread = new Thread(newHare); hareThread.start(); Torotose newTortose = new Torotose(); torotoseThread = new Thread(newTortose); torotoseThread.start(); //updateDisplay(); } private synchronized void check(int value1, int value2) { if((value1-value2) >= 10) { try { wait(); } catch(Exception ex) { System.out.println(ex); } } } private synchronized void getGoing(int value1, int value2) { if((value1-value2) == 0) { try { notify(); } catch(Exception ex) { System.out.println(ex); } } } private class Hare extends Thread { public void run() { while(true) { num++; hare.setText(Integer.toString(num)); check(num, num2); try { // are threads different in andriod apps? Thread.sleep(100); // hareThread.sleep(100); } catch(Exception ex) { System.out.println(ex); } } } } private class Torotose extends Thread { public void run() { while(true) { num2++; tortose.setText(Integer.toString(num2)); getGoing(num,num2); try { Thread.sleep(200); //torotoseThread.sleep(200); } catch(Exception ex) { System.out.println(ex); } } } } } First it wanted me to change my threads to like static threads.So is this just how Android does it? Next when I run this code it just crashes with some unexpected error. I am not sure what the error is but when I try to debug it and goes to like to create a new "hare" object it shows me this. // Compiled from ClassLoader.java (version 1.5 : 49.0, super bit) public abstract class java.lang.ClassLoader { // Method descriptor #8 ()V // Stack: 3, Locals: 1 protected ClassLoader(); 0 aload_0 [this] 1 invokespecial java.lang.Object() [1] 4 new java.lang.RuntimeException [2] 7 dup 8 ldc <String "Stub!"> [3] 10 invokespecial java.lang.RuntimeException(java.lang.String) [4] 13 athrow Line numbers: [pc: 0, line: 4] Local variable table: [pc: 0, pc: 14] local: this index: 0 type: java.lang.ClassLoader // Method descriptor #14 (Ljava/lang/ClassLoader;)V // Stack: 3, Locals: 2 protected ClassLoader(java.lang.ClassLoader parentLoader); 0 aload_0 [this] 1 invokespecial java.lang.Object() [1] 4 new java.lang.RuntimeException [2] 7 dup 8 ldc <String "Stub!"> [3] 10 invokespecial java.lang.RuntimeException(java.lang.String) [4] 13 athrow Line numbers: [pc: 0, line: 5] Local variable table: [pc: 0, pc: 14] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 14] local: parentLoader index: 1 type: java.lang.ClassLoader // Method descriptor #17 ()Ljava/lang/ClassLoader; // Stack: 3, Locals: 0 public static java.lang.ClassLoader getSystemClassLoader(); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 6] // Method descriptor #19 (Ljava/lang/String;)Ljava/net/URL; // Stack: 3, Locals: 1 public static java.net.URL getSystemResource(java.lang.String resName); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 7] Local variable table: [pc: 0, pc: 10] local: resName index: 0 type: java.lang.String // Method descriptor #23 (Ljava/lang/String;)Ljava/util/Enumeration; // Signature: (Ljava/lang/String;)Ljava/util/Enumeration<Ljava/net/URL;>; // Stack: 3, Locals: 1 public static java.util.Enumeration getSystemResources(java.lang.String resName) throws java.io.IOException; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 8] Local variable table: [pc: 0, pc: 10] local: resName index: 0 type: java.lang.String // Method descriptor #29 (Ljava/lang/String;)Ljava/io/InputStream; // Stack: 3, Locals: 1 public static java.io.InputStream getSystemResourceAsStream(java.lang.String resName); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 9] Local variable table: [pc: 0, pc: 10] local: resName index: 0 type: java.lang.String // Method descriptor #31 ([BII)Ljava/lang/Class; // Signature: ([BII)Ljava/lang/Class<*>; // Stack: 3, Locals: 4 protected final java.lang.Class defineClass(byte[] classRep, int offset, int length) throws java.lang.ClassFormatError; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 10] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: classRep index: 1 type: byte[] [pc: 0, pc: 10] local: offset index: 2 type: int [pc: 0, pc: 10] local: length index: 3 type: int // Method descriptor #39 (Ljava/lang/String;[BII)Ljava/lang/Class; // Signature: (Ljava/lang/String;[BII)Ljava/lang/Class<*>; // Stack: 3, Locals: 5 protected final java.lang.Class defineClass(java.lang.String className, byte[] classRep, int offset, int length) throws java.lang.ClassFormatError; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 11] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: className index: 1 type: java.lang.String [pc: 0, pc: 10] local: classRep index: 2 type: byte[] [pc: 0, pc: 10] local: offset index: 3 type: int [pc: 0, pc: 10] local: length index: 4 type: int // Method descriptor #42 (Ljava/lang/String;[BIILjava/security/ProtectionDomain;)Ljava/lang/Class; // Signature: (Ljava/lang/String;[BIILjava/security/ProtectionDomain;)Ljava/lang/Class<*>; // Stack: 3, Locals: 6 protected final java.lang.Class defineClass(java.lang.String className, byte[] classRep, int offset, int length, java.security.ProtectionDomain protectionDomain) throws java.lang.ClassFormatError; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 12] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: className index: 1 type: java.lang.String [pc: 0, pc: 10] local: classRep index: 2 type: byte[] [pc: 0, pc: 10] local: offset index: 3 type: int [pc: 0, pc: 10] local: length index: 4 type: int [pc: 0, pc: 10] local: protectionDomain index: 5 type: java.security.ProtectionDomain // Method descriptor #46 (Ljava/lang/String;Ljava/nio/ByteBuffer;Ljava/security/ProtectionDomain;)Ljava/lang/Class; // Signature: (Ljava/lang/String;Ljava/nio/ByteBuffer;Ljava/security/ProtectionDomain;)Ljava/lang/Class<*>; // Stack: 3, Locals: 4 protected final java.lang.Class defineClass(java.lang.String name, java.nio.ByteBuffer b, java.security.ProtectionDomain protectionDomain) throws java.lang.ClassFormatError; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 13] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: name index: 1 type: java.lang.String [pc: 0, pc: 10] local: b index: 2 type: java.nio.ByteBuffer [pc: 0, pc: 10] local: protectionDomain index: 3 type: java.security.ProtectionDomain // Method descriptor #52 (Ljava/lang/String;)Ljava/lang/Class; // Signature: (Ljava/lang/String;)Ljava/lang/Class<*>; // Stack: 3, Locals: 2 protected java.lang.Class findClass(java.lang.String className) throws java.lang.ClassNotFoundException; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 14] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: className index: 1 type: java.lang.String // Method descriptor #52 (Ljava/lang/String;)Ljava/lang/Class; // Signature: (Ljava/lang/String;)Ljava/lang/Class<*>; // Stack: 3, Locals: 2 protected final java.lang.Class findLoadedClass(java.lang.String className); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 15] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: className index: 1 type: java.lang.String // Method descriptor #52 (Ljava/lang/String;)Ljava/lang/Class; // Signature: (Ljava/lang/String;)Ljava/lang/Class<*>; // Stack: 3, Locals: 2 protected final java.lang.Class findSystemClass(java.lang.String className) throws java.lang.ClassNotFoundException; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 16] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: className index: 1 type: java.lang.String // Method descriptor #17 ()Ljava/lang/ClassLoader; // Stack: 3, Locals: 1 public final java.lang.ClassLoader getParent(); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 17] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader // Method descriptor #19 (Ljava/lang/String;)Ljava/net/URL; // Stack: 3, Locals: 2 public java.net.URL getResource(java.lang.String resName); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 18] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: resName index: 1 type: java.lang.String // Method descriptor #23 (Ljava/lang/String;)Ljava/util/Enumeration; // Signature: (Ljava/lang/String;)Ljava/util/Enumeration<Ljava/net/URL;>; // Stack: 3, Locals: 2 public java.util.Enumeration getResources(java.lang.String resName) throws java.io.IOException; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 19] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: resName index: 1 type: java.lang.String // Method descriptor #29 (Ljava/lang/String;)Ljava/io/InputStream; // Stack: 3, Locals: 2 public java.io.InputStream getResourceAsStream(java.lang.String resName); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 20] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: resName index: 1 type: java.lang.String // Method descriptor #52 (Ljava/lang/String;)Ljava/lang/Class; // Signature: (Ljava/lang/String;)Ljava/lang/Class<*>; // Stack: 3, Locals: 2 public java.lang.Class loadClass(java.lang.String className) throws java.lang.ClassNotFoundException; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 21] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: className index: 1 type: java.lang.String // Method descriptor #62 (Ljava/lang/String;Z)Ljava/lang/Class; // Signature: (Ljava/lang/String;Z)Ljava/lang/Class<*>; // Stack: 3, Locals: 3 protected java.lang.Class loadClass(java.lang.String className, boolean resolve) throws java.lang.ClassNotFoundException; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 22] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: className index: 1 type: java.lang.String [pc: 0, pc: 10] local: resolve index: 2 type: boolean // Method descriptor #67 (Ljava/lang/Class;)V // Signature: (Ljava/lang/Class<*>;)V // Stack: 3, Locals: 2 protected final void resolveClass(java.lang.Class clazz); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 23] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: clazz index: 1 type: java.lang.Class Local variable type table: [pc: 0, pc: 10] local: clazz index: 1 type: java.lang.Class<?> // Method descriptor #19 (Ljava/lang/String;)Ljava/net/URL; // Stack: 3, Locals: 2 protected java.net.URL findResource(java.lang.String resName); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 24] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: resName index: 1 type: java.lang.String // Method descriptor #23 (Ljava/lang/String;)Ljava/util/Enumeration; // Signature: (Ljava/lang/String;)Ljava/util/Enumeration<Ljava/net/URL;>; // Stack: 3, Locals: 2 protected java.util.Enumeration findResources(java.lang.String resName) throws java.io.IOException; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 25] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: resName index: 1 type: java.lang.String // Method descriptor #76 (Ljava/lang/String;)Ljava/lang/String; // Stack: 3, Locals: 2 protected java.lang.String findLibrary(java.lang.String libName); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 26] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: libName index: 1 type: java.lang.String // Method descriptor #79 (Ljava/lang/String;)Ljava/lang/Package; // Stack: 3, Locals: 2 protected java.lang.Package getPackage(java.lang.String name); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 27] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: name index: 1 type: java.lang.String // Method descriptor #81 ()[Ljava/lang/Package; // Stack: 3, Locals: 1 protected java.lang.Package[] getPackages(); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 28] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader // Method descriptor #83 (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/net/URL;)Ljava/lang/Package; // Stack: 3, Locals: 9 protected java.lang.Package definePackage(java.lang.String name, java.lang.String specTitle, java.lang.String specVersion, java.lang.String specVendor, java.lang.String implTitle, java.lang.String implVersion, java.lang.String implVendor, java.net.URL sealBase) throws java.lang.IllegalArgumentException; 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 29] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: name index: 1 type: java.lang.String [pc: 0, pc: 10] local: specTitle index: 2 type: java.lang.String [pc: 0, pc: 10] local: specVersion index: 3 type: java.lang.String [pc: 0, pc: 10] local: specVendor index: 4 type: java.lang.String [pc: 0, pc: 10] local: implTitle index: 5 type: java.lang.String [pc: 0, pc: 10] local: implVersion index: 6 type: java.lang.String [pc: 0, pc: 10] local: implVendor index: 7 type: java.lang.String [pc: 0, pc: 10] local: sealBase index: 8 type: java.net.URL // Method descriptor #94 (Ljava/lang/Class;[Ljava/lang/Object;)V // Signature: (Ljava/lang/Class<*>;[Ljava/lang/Object;)V // Stack: 3, Locals: 3 protected final void setSigners(java.lang.Class c, java.lang.Object[] signers); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 30] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: c index: 1 type: java.lang.Class [pc: 0, pc: 10] local: signers index: 2 type: java.lang.Object[] Local variable type table: [pc: 0, pc: 10] local: c index: 1 type: java.lang.Class<?> // Method descriptor #100 (Ljava/lang/String;Z)V // Stack: 3, Locals: 3 public void setClassAssertionStatus(java.lang.String cname, boolean enable); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 31] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: cname index: 1 type: java.lang.String [pc: 0, pc: 10] local: enable index: 2 type: boolean // Method descriptor #100 (Ljava/lang/String;Z)V // Stack: 3, Locals: 3 public void setPackageAssertionStatus(java.lang.String pname, boolean enable); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 32] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: pname index: 1 type: java.lang.String [pc: 0, pc: 10] local: enable index: 2 type: boolean // Method descriptor #106 (Z)V // Stack: 3, Locals: 2 public void setDefaultAssertionStatus(boolean enable); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 33] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader [pc: 0, pc: 10] local: enable index: 1 type: boolean // Method descriptor #8 ()V // Stack: 3, Locals: 1 public void clearAssertionStatus(); 0 new java.lang.RuntimeException [2] 3 dup 4 ldc <String "Stub!"> [3] 6 invokespecial java.lang.RuntimeException(java.lang.String) [4] 9 athrow Line numbers: [pc: 0, line: 34] Local variable table: [pc: 0, pc: 10] local: this index: 0 type: java.lang.ClassLoader } So I am not sure where I went wrong. Thanks

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jQuery - addClass or removeClass - Is there an append class?

- by iamtheratio

I have css hover over images for my tabs and I'm trying to get the class to change from .how to .how_on when I click on the image HOW. My tabs are HOW | WHAT | WHEN | WHO | WHY I have classes for each (.how, .how_on), (.what, .what_on), etc... Can I make jQuery add _on to the original class name using click(function(){}); ? HTML: <div id="tab_container"> <ul class="tabs"> <li><a class="how_on" href="#how">How</a></li> <li><a class="why" href="#why">Why</a></li> <li><a class="what" href="#what">What</a></li> <li><a class="who" href="#who">Who</a></li> <li><a class="when" href="#when">When</a></li> </ul> <p><img src="images/tab_top.jpg" width="864px" height="6px" alt="" border="0" /></p> </div> <div class="tab_body">  <div id="how" class="tab"> <strong>HOW IT WORKS:</strong> </div> JQUERY: <script type="text/javascript"> jQuery(document).ready(function(){ //if this is not the first tab, hide it jQuery(".tab:not(:first)").hide(); //to fix u know who jQuery(".tab:first").show(); //when we click one of the tabs jQuery(".tabs a").click(function(){ //get the ID of the element we need to show stringref = jQuery(this).attr("href").split('#')[1]; // adjust css on tabs to show active tab //hide the tabs that doesn't match the ID jQuery('.tab:not(#'+stringref+')').hide(); //fix if (jQuery.browser.msie && jQuery.browser.version.substr(0,3) == "6.0") { jQuery('.tab#' + stringref).show(); } else //display our tab fading it in jQuery('.tab#' + stringref).fadeIn(); //stay with me return false; }); }); </script>

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Where about should my main class be created in a project?

- by Dan

The problem is where a class should be created in my code. An example is I have a UI class and a main logic class that controls other objects. Should the main logic class create the UI object, or should the UI object create the instance of the main logic class? An explanation of which method is best and why would be ideal. Thanks.

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Is there a way define a global variable which is accesible from a class method?

- by Starx

Here is the situation I create a instance of a class $newobj = new classname1; Then I have another class writtern below and I want to this class to access the object above class newclass { public function test() { echo $newobj->display(); } } It is not allowed, is there a way define a variable globally through a class?

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