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  • Problem understanding Inheritance

    - by dhruvbird
    I've been racking my brains over inheritance for a while now, but am still not completely able to get around it. For example, the other day I was thinking about relating an Infallible Human and a Fallible Human. Let's first define the two: Infallible Human: A human that can never make a mistake. It's do_task() method will never throw an exception Fallible Human: A human that will occasionally make a mistakes. It's do_task() method may occasionally throw a ErrorProcessingRequest Exception The question was: IS an infallible human A fallible human OR IS a fallible human AN infallible human? The very nice answer I received was in the form of a question (I love these since it gives me rules to answer future questions I may have). "Can you pass an infallible human where a fallible human is expected OR can you pass a fallible human where an infallible human is expected?" It seems apparent that you can pass an infallible human where a fallible human is expected, but not the other way around. I guess that answered my question. However, it still feels funny saying "An infallible human is a fallible human". Does anyone else feel queasy when they say it? It almost feels as if speaking out inheritance trees is like reading out statements from propositional calculus in plain English (the if/then implication connectives don't mean the same as that in spoken English). Does anyone else feel the same?

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  • C# array problem

    - by user208080
    Hi there. I am a newbie in C# and here are 2 questions: I have a 2d array a[3,3], how can I express one dimension as a new array and pass to some function. i.e. int[,] a = new int[3,3]; a[0,0] = 1; ... string b = concatenate(a[0]); // where concatenate is a function take a one dimension array as param Can I create a 65000x65000 array with C#? I got some "out of memory" error. Thanks in advance.

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  • Firefox DOMParser problem

    - by Michael
    For some reason DOMParser is adding some additional #text elements for each newline \n for this url http://rt.com/Root.rss ...as well as many other RSS I've tried. I checked cnn/bbc feeds, they don't have newlines and dom parser handling them nicely. So I have to add the following before parsing it var xmlText = htmlText.replace(/\n[ ]*/g, ""); var xmlDoc = parser.parseFromString(xmlText, "text/xml"); Server is returning text/xml. var channel = xmlDoc.documentElement.childNodes[0]; this returning \n without my code above and channel with correction.

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  • Change Exchange Server Name Before Upgrade

    - by ffrugone
    I need to upgrade the Exchange Server from 2003 to 2010. I'm physically changing servers as well as software. I'm worried about redirecting the Outlook clients after the upgrade is going to be troublesome. So, I thought that before doing anything else, that I would change the name of the Exchange server on the client from 'server-name.domain.com' to 'mail.domain.com' and add an entry in dns that points 'mail.domain.com' to the same ip as 'server-name.domain.com'. However, even though I added 'mail.domain.com' to the dns, I cannot get the Exchange server to change to that on the client computers. I found out that the Outlook clients check the Global Catalog for the name of the Exchange server computer. My question is: can I change the Global Catalog address of the Exchange computer from 'server-name.domain.com' to 'mail.domain.com'? If so/not, is there a better way to do this? thanks.

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  • jQuery display problem?

    - by SLAPme
    How do I hide the #changes-saved code using jQuery? For example let's say the code is displayed when the user clicks the submit button and then leaves the current web page and then returns back to the web page and the #changes-saved is no longer displayed until the submit button is clicked again. Here is the jQuery code. $(function() { $('#changes-saved').hide(); $(".save-button").click(function() { $.post($("#contact-form").attr("action"), $("#contact-form").serialize(), function(html) { $("div.contact-info-form").html(html); $('#changes-saved').append('<li>Changes saved!</li>').show().pause(1000).hide(); }); return false; // Prevent normal submit. }); });

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  • T-SQL Specific Syntax problem (Simple no doubt)

    - by Yoda
    Hi guys, I have an issue with a query I'm trying to run on some data, I guess the place to start is to describe the data. Ok so I have a list of email addresses, each email address has a unique ID and an account ID Also in my tables I have a set number which auto incrememnts, this will allow me to target duplicate email addresses What I need to do is something like this. Insert into duplicates (EMAIL,ACCOUNTID,ID) SELECT Email,AccountID,ID FROM EmailAddresses Group by Email,AccountID Having Count(email)>1 Order by AccountID, Email So essentially I want to select all duplicate email addresses and insert them (and their relative fields) into a new table broken down by accountID so I can run some further querys on it. I have been battling with this for way too long and could just use a fresh perspective. Cheers in advance

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  • Reflection problem - Type Safety Warning

    - by jax
    Class<? extends Algorithm> alg = AlgorithmAllFrom9AndLastFrom10Impl.class Constructor<Algorithm> c = alg.getConstructors()[0]; For "alg.getConstructors()[0];" I am getting a warning in eclipse Type safety: The expression of type Constructor needs unchecked conversion to conform to Constructor How do I fix this?

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  • OnSize() Problem in VC++

    - by Anu
    Hi, In my VC++ MFC applcaiton,i have different views.And in each view,when i maximize it,i changed the size and position to new thing(Normally it fully get maximixed to screen size).But i dont want tht.So in OnSize() i coded like this. void CChildFrame::OnSize(UINT nType, int cx, int cy) { CMDIChildWnd::OnSize(nType, cx, cy); int XBorder = GetSystemMetrics(SM_CXMAXIMIZED); int YBorder = GetSystemMetrics(SM_CYMAXIMIZED); switch (nType) { case SIZE_MAXIMIZED: SetWindowPos(NULL,0,60,XBorder-45,YBorder-60,SWP_NOZORDER ); break; } } But what happened is?When i maximize the view,its get maximized to above mention size only.But in that blue bar,there si no minimize,maximize,close button. When i double click in the blue bar,its get to resumed to previous postion with all buttons. How can i get that?

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  • Problem reading in file written with xdr using c

    - by Inga
    I am using Ubuntu 10.4 and have two (long) C programs, one that writes a file using XDR, and one that uses this file as input. However, the second program does not manage to read in the written file. Everything looks perfectly fine, it just does not work. More spesifically it fails at the last line added here with the error message xdr_string(), which indicates that it can not read in the first line of the input file. I do no see any obvious errors. The input file is written out, have a content and I can see the right strings using stings -a -n 2 "inputfile". Anyone have any idea what is going wrong? Relevant parts of program 1 (writer): /** * create compressed XDR output stream */ output_file=open_write_pipe(output_filename); xdrstdio_create(&xdrs, output_file, XDR_ENCODE); /** * print material name */ if( xdr_string(&xdrs, &name, _POSIX_NAME_MAX) == FALSE ) xdr_err("xdr_string()"); Relevant parts of program 2 (reader): /** * open data file */ input_file=open_data_file(input_filename, "r"); if( input_file == NULL ){ ERROR(input_filename); exit(EXIT_FAILURE); } /** * create input XDR stream */ xdrstdio_create(&xdrs, input_file, XDR_DECODE); /** * read material name */ if(xdr_string(&xdrs, &name, _POSIX_NAME_MAX) == FALSE) XDR_ERR("xdr_string()");

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  • Problem in homemade function to merge objects

    - by Eric
    I'm trying to make a function that merges arrays. The reason is, I have a function that supposed to get the settings of an entity, and merge them with the global defaults. //So for example, let's say globalOptions is something like this var globalOptions={opt1:'foo',opt2:'something'}; //and this is entityOptions var entityOptions={opt1:'foofoo',opt2:null}; The only difference is it has objects in objects and objects in objects in objects, so what I made was a function that loops through all objects, thinking I would later, easily be able to loop through it all. Please ignore the array thing. That is defected, but unneeded. function loopObj(obj, call, where, objcall, array) { if ($.isArray(obj) || $.isPlainObject(obj)) { for (i in obj) { if ($.isArray(obj)) { if (array) { loopObj(obj[i], call, where[where.length] = i, true); if (objcall) { call(obj[i],where,true); } } else { loopObj(obj[i], call, where+'['+i+']', false); if (objcall) { call(obj[i],where,true); } } } else { if (array) { loopObj(obj[i], call, where[where.length] = parseInt(i), true); if (objcall) { call(obj[i],where,true); } } else { loopObj(obj[i], call, where+'[\''+i+'\']', false); if (objcall) { call(obj[i],where,true); } } } } } else { return call(obj,where); } } Then I made this program to convert it: function mergeObj(a,b) { temp.retd = new Object(); loopObj(a,function (c,d) { if (c) { eval(d.replace('%par%','temp.retd'))=c; } else { eval(d.replace('%par%','temp.retd'))=eval(d.replace('%par%','b')); } },'%par%', true); return temp.retd(); } I get the error: Uncaught ReferenceError: Invalid left-hand side in assignment (anonymous function)base.js:51 loopObjbase.js:40 loopObjbase.js:31 mergeObjbase.js:46 (anonymous function)base.js:72 I know what it means, the eval returns an anonomys variable (copy of the variable), so I can't set it, only get it.

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  • mysqldump problem with case sensitivity? Win->linux

    - by acidzombie24
    When i dump a table with uppercase letters using mysqldump it comes out as lower case in my dump.sql file. I found a report here in 2006, almost 4 years old http://bugs.mysql.com/bug.php?id=19967 A solution here suggest making linux insensitive. I rather not if possible. Whats the easiest way to copy a win32 db into linux?

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  • Problem with Xcode and iPhone preference files

    - by CyDummy
    Hi, I created four language files for my app: two for the preferences and two for the strings. I added them into Xcode and it works great on the phone but the string files are shown as "Localizable.strings (de)" and "Localizable.strings (en)", while I have two files called "Root.plist" under the "Settings.bundle" in the groups "de.lproj" and "en.lproj" (see screenshot).When I don't add the two "Root.plist" files instead of "Settings.bundle", I get what I want ("Root.plist (de)" and "Root.plist (en)") but I have no "Settings.bundle" in Xcode. Is somebody out there who can help me to a get what I want?

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  • Problem with validating ModelForm

    - by user561640
    I use ModelForm to create my form. All works fine except 1 thing - validating the unique field. Code: class Article(models.Model): ... title = models.CharField(max_length=255, unique=True, error_messages={'max_length' : 'max translation', 'unique' : 'unique translation', 'required' : 'req translation',}) ... class ArticleForm(ModelForm): ... title = forms.CharField(max_length=255, min_length=3, error_messages={'required' : 'req translation', 'min_length' : 'min translation', 'max_length' : 'max translation', 'unique' : 'unique translation',}) But when I save my form with non-unique title I don't get my custom translated error but I get default error. How to fix it, that my unique field error is displayed?

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  • select query related problem

    - by user222585
    i have interest rate and amount in a table where interest rate are ranged in different values like 4.5,4.6,5.2,5.6 etc. i want to get sum of amounts classified by interest rate where interest rate will be separated by .25. for example all amount having interest rate 1.25,1.3,1.4 will be in one group and 1.5,1.67,1.9 will be in another group how can i write the query?

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  • SQL Server 2008 Problem with SCOPE_IDENTITY()

    - by jinsungy
    My code does not update the thread field. It is null. Anyone have any ideas? INSERT INTO [Messages]([Sender], [Receiver], [Job_Number], [Subject], [MessageText], [DateSent]) VALUES(@Sender, @Receiver, @Job_Number, @Subject, @MessageText, @DateSent) SET @ThreadID = SCOPE_IDENTITY() UPDATE [Messages] SET Thread = @ThreadID WHERE MessageID = @ThreadID

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  • Base class Undefined WEIRD problem . Need help

    - by nXqd
    My CGameStateLogo which inherit from CGameState: CGameStateLogo.h #pragma once #include "GameState.h" class CGameMain; class CGameState; class CGameStateLogo: public CGameState { public: void MessageEnter (); void MessageUpdate( int iKey ); void MessagePaint( HDC* pDC ); public: CGameStateLogo(CGameMain* pGameMain); CGameStateLogo(void); ~CGameStateLogo(void); }; CGameState.h #pragma once #include "GameMain.h" #include "MyBitmap.h" class CGameMain; class CMyBitmap; class CGameState { public: CMyBitmap* pbmCurrent; CGameMain* pGM; int GameStateID; virtual void MessageEnter () = 0; virtual void MessageUpdate( int iKey ) = 0; virtual void MessagePaint( HDC* pDC ) = 0; void StateHandler ( int msg, HDC* pDC, int key ); public: CGameState(void); ~CGameState(void); }; Thanks for reading this :)

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  • Problem with passing folder path string to web service function via jQuery.ajax

    - by the_V
    Hello, I need to perform asp.net web-service function call via jQuery and pass asp.net application path to it. That's the way I'm trying to do it (code is located within asp.net page, e.g. aspx file): var d = "{'str':'<%=System.DateTime.Now.ToString() %>', 'applicationPath':'<%=GetApplicationPath() %>'}"; $.ajax({ type: "POST", url: "http://localhost/testwebsite/TestWebService.asmx/Test", data: d, contentType: "application/json; charset=utf-8", dataType: "json", error: function (xhr, status, error) { var err = eval("(" + xhr.responseText + ")"); alert(err.Message); }, success: function (msg) { } }); That's what GetApplicationPath method looks like: protected string GetApplicationPath() { return HttpUtility.HtmlEncode(Request.PhysicalApplicationPath); } And here is a header of web-service function which I'm trying to call: public void Test(string str, string applicationPath) Function call works well, but applicationPath parameter doesn't passed correctly. When I debug it I see that backslashes are removed, function gets "C:ProjectsSamplesmytestwebsite" instead of "'C:\Projects\Samples\mytestwebsite\'". How can I overcome this?

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  • Mysterious c debugging problem when trying to utilize printfs

    - by O_O
    Ok, folks. I've never encountered this before and it boggles the mind and is illogical. I have a somewhat complex loop and I want to try and see if everything is working by putting some printf statements. I look the intermediate products using printf and verify that the answer is ok. Then, when I comment out the printf to the intermediate products, the answer is WRONG. Has anyone ever encountered this? This is driving me insane and I don't see how the printfs could change an answer.... X_x If it helps, I am using a c/c++ compiler for a DSP. Thanks for any advice.. Here is a snippet... printf("splitBackground = %d, numWindowPoints = %d\n", splitBackground, numWindowPoints); splitBackground = splitBackground/numWindowPoints; printf("%d ", splitBackground); This is good but when I comment out the first line of code, it turns out to be hugely incorrect. :(

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  • problem in playing mp4 video in safari

    - by Codiator
    I have a particular link to a video file in server. when i load the safari through [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://mydomain/category/2.mp4"]]; simulator pops out an alert message saying that "Cannot Play MOVIE.. Server is not correctly configured"....... Even I tried using the mediaPlayer framework - MPMoviePlayerController and loading it with th e url-"http://mydomain/category/2.mp4" but it didnt play out. when i paste the same url in the 10.5 leopards safari it plays out smoothly.. What may be the reason behind it.?

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  • PHP Code Problem...

    - by aamir Fayyaz
    function check_login($array_val) { $strQury = "Select * from tblsignup where usr_email ='".$array_val[0]."' and usr_password = '".$array_val[1]."'" ; $result = mysql_query($strQury); $row_user = mysql_fetch_array($result); if(mysql_num_rows($result)>0) { $msg = "true"; } else { $msg = "false"; } return $msg ; } The return value is Object id #1true???? what is object id#1?

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  • basic modal dialog hiding problem

    - by senzacionale
    I am using basic modal dialog: http://www.ericmmartin.com/projects/simplemodal-demos/ $(document).ready(function() { $("#bodyTxt .basic").click(function() { var text = $(this).attr("title"); $("#basicModalContent").html(text).modal(); return false; }); }); but when i click on X code is now visible in page. How can after i close model dialog delete html code and add #basicModalContent display to none?

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  • extending flex 4 'group' component problem

    - by charlielee
    Hi, I have a component that were exported from catalyst (the component is based on a tag). Now I created a new component extending this. However when I add this new component to my module it doesn't seem to inherit the designs that were exported from catalyst. Any idea how i can do that? Ofcource when I add the component that were directly out of catalyst all the designs appears.. Thanks.

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  • SQL Server identity counterpart problem

    - by Guru
    Hi there, I'm using SQL Server and I want to use identity constraint in it I know how to use it in following manner create table mytable ( c1 int primary key identity(1,1); ) the above code works fine but what if i want the identity column to have values as EMP001, EMP002,... instead of 1,2.... Thanks in advance, Guru

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