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• template specilization using member enums

  - by Altan

  struct Bar { enum { Special = 4 }; }; template<class T, int K> struct Foo {}; template<class T> struct Foo<T::Special> {}; Usage: Foo<Bar> aa; fails to compile using gcc 4.1.2 It complains about the usage of T::Special for partial specilization of Foo. If Special was a class the solution would be to a typename in front of it. Is there something equivalent to it for enums (or integers)? Thanks, Altan

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• Best way to create Default.png image for iPhone app

  - by Alex

  Originally I though I'll just take a screenshot of my app on the iPhone then tweak it in Photoshop. The images should be 480 x 320 according to Apple doc, and the dimensions of my screenshot are 480 x 320. But, the screenshot contains notification area (where reception bars, battery life, etc. are displayed) So, if I chop that part off my image will be a bit shorter and not 480px high. What do I do? Submit a shorter image? Stretch it up so it's 480px but without the notification bar? Submit it with the notification bar in the image? How did you create your Default.png?

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• C#: ExecuteNonQuery() returns -1 when execute the stored procedure

  - by user1122359

  I'm trying to execute stored procedure in Visual Studio. Its given below. CREATE PROCEDURE [dbo].[addStudent] @stuName varchar(50), @address varchar(100), @tel varchar(15), @etel varchar(15), @nic varchar (10), @dob date AS BEGIN SET NOCOUNT ON; DECLARE @currentID INT DECLARE @existPerson INT SET @existPerson = (SELECT p_ID FROM Student WHERE s_NIC = @nic); IF @existPerson = null BEGIN INSERT INTO Person (p_Name, p_RegDate, p_Address, p_Tel, p_EmergeNo, p_Valid, p_Userlevel) VALUES (@stuName, GETDATE(), @address, @tel, @etel, 0, 'Student' ); SET @currentID = (SELECT MAX( p_ID) FROM Person); INSERT INTO Student (p_ID, s_Barcode, s_DOB, s_NIC) VALUES (@currentID , NULL, @dob, @nic); return 0; END ELSE return -1; END Im doing so by using this code below. SqlConnection con = new SqlConnection(); Connect conn = new Connect(); con = conn.getConnected(); con.Open(); cmd = new SqlCommand("addStudent", con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add("@stuName", SqlDbType.VarChar).Value = nameTxt.Text.ToString(); cmd.Parameters.Add("@address", SqlDbType.VarChar).Value = addressTxt.Text.ToString(); cmd.Parameters.Add("@tel", SqlDbType.VarChar).Value = telTxt.Text.ToString(); cmd.Parameters.Add("@etel", SqlDbType.VarChar).Value = emerTxt.Text.ToString(); cmd.Parameters.Add("@nic", SqlDbType.VarChar).Value = nicTxt.Text.ToString(); cmd.Parameters.Add("@dob", SqlDbType.DateTime).Value = dobTime.Value.ToString("MM-dd-yyyy"); int n = cmd.ExecuteNonQuery(); MessageBox.Show(n.ToString()); But it returns me -1. I tried this stored procedure by entering the same values I captured from debugging. It was successful. What can be the possible error? Thanks a lot!

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• C# windows application, how to save & restore positions of child forms.

  - by Manish Gupta

  I have a windows application with an MDI form and some child forms. I need to save the position of the child forms and then restore when it is opened again. How to do that in C#? Also, I need to check if the child form's title bar is not hidden under the mdi form (e.g title bar might get hidden because of mdi form's menus). If this is the case, then I need to set the position smartly. Thanks in advance...

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• learning C++ from java, trying to make a linked list.

  - by kyeana

  I just started learning c++ (coming from java) and am having some serious problems with doing anything :P Currently, i am attempting to make a linked list, but must be doing something stupid cause i keep getting "void value not ignored as it ought to be" compile errors (i have it marked where it is throwing it bellow). If anyone could help me with what im doing wrong, i would be very grateful :) Also, I am not used to having the choice of passing by reference, address, or value, and memory management in general (currently i have all my nodes and the data declared on the heap). If anyone has any general advice for me, i also wouldn't complain :P Key code from LinkedListNode.cpp LinkedListNode::LinkedListNode() { //set next and prev to null pData=0; //data needs to be a pointer so we can set it to null for //for the tail and head. pNext=0; pPrev=0; } /* * Sets the 'next' pointer to the memory address of the inputed reference. */ void LinkedListNode::SetNext(LinkedListNode& _next) { pNext=&_next; } /* * Sets the 'prev' pointer to the memory address of the inputed reference. */ void LinkedListNode::SetPrev(LinkedListNode& _prev) { pPrev=&_prev; } //rest of class Key code from LinkedList.cpp #include "LinkedList.h" LinkedList::LinkedList() { // Set head and tail of linked list. pHead = new LinkedListNode(); pTail = new LinkedListNode(); /* * THIS IS WHERE THE ERRORS ARE. */ *pHead->SetNext(*pTail); *pTail->SetPrev(*pHead); } //rest of class

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• <button type="submit"> compatibility?

  - by Mark

  I'd like to have a submit button that submits a different value than is displayed on the button. With <input type="submit"> you can't seem to do this. With <button type="submit"> however, these can be two different values. The question is, will it work in all browsers? Trying this test code here: <form method="get" action=""> <input type="text" name="txt"/> <button type="submit" name="btn" value="val">text</button> </form> In FF 3.6 it updates my address bar with both values appropriately (and responds to me pressing enter in the text box). In IE 8, it also accepts pressing enter, displays the text value in the address bar, but it show the button's value as a GET param at all... does that mean it's not submitting it?

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• How to break closures in JavaScript

  - by Not a Name

  Is there any way to break a closure easily in JavaScript? The closest I have gotten is this: var src = 3; function foo () { return function () { return src; } } function bar (func) { var src = 9; return eval('('+func.toString()+')')(); // Line breaks closure } alert(bar(foo())); Which prints 9, instead of 3 as a closure would dictate. However, this approach seems kind of ugly to me, are there any better ways?

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• Capture variable assignments in a Perl eval

  - by Bruce

  I would like to be able to capture variable assignments from a Perl eval. That is, to determine what variable names have been assigned to within the code and extract their value. For example if I run: eval '$foo=42; $bar=3.14;' The result of the eval is 3.14 (the last value evaluated), but I would also like to be able to determine the names "$foo" and "$bar" and their values (without knowing the names in advance). I have read up on a couple of ways of inserting variables into the eval block, through Safe and Eval::Context, but not yet any way of extracting them. I am more familiar with Python's eval/exec which have built in support for 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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• How to access constant defined in child class from parent class functions?

  - by kavoir.com

  I saw this example from php.net: <?php class MyClass { const MY_CONST = "yonder"; public function __construct() { $c = get_class( $this ); echo $c::MY_CONST; } } class ChildClass extends MyClass { const MY_CONST = "bar"; } $x = new ChildClass(); // prints 'bar' $y = new MyClass(); // prints 'yonder' ?> But $c::MY_CONST is only recognized in version 5.3.0 or later. The class I'm writing may be distributed a lot. Basically, I have defined a constant in ChildClass and one of the functions in MyClass (father class) needs to use the constant. Any idea?

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• How to map one class against multiple tables with SQLAlchemy?

  - by tote

  Lets say that I have a database structure with three tables that look like this: items - item_id - item_handle attributes - attribute_id - attribute_name item_attributes - item_attribute_id - item_id - attribute_id - attribute_value I would like to be able to do this in SQLAlchemy: item = Item('item1') item.foo = 'bar' session.add(item) session.commit() item1 = session.query(Item).filter_by(handle='item1').one() print item1.foo # => 'bar' I'm new to SQLAlchemy and I found this in the documentation (http://www.sqlalchemy.org/docs/05/mappers.html#mapping-a-class-against-multiple-tables): j = join(items, item_attributes, items.c.item_id == item_attributes.c.item_id). \ join(attributes, item_attributes.c.attribute_id == attributes.c.attribute_id) mapper(Item, j, properties={ 'item_id': [items.c.item_id, item_attributes.c.item_id], 'attribute_id': [item_attributes.c.attribute_id, attributes.c.attribute_id], }) It only adds item_id and attribute_id to Item and its not possible to add attributes to Item object. Is what I'm trying to achieve possible with SQLAlchemy? Is there a better way to structure the database to get the same behaviour of "dynamic columns"?

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• How to make a call to an executable from Python script?

  - by fx

  I need to execute this script from my Python script. Is it possible? The script generate some outputs with some files being written. How do I access these files? I have tried with subprocess call function but without success. fx@fx-ubuntu:~/Documents/projects/foo$ bin/bar -c somefile.xml -d text.txt -r aString -f anotherString >output The application "bar" also references to some libraries, it also creates some files besides the output. How do I get access to these files? Just by using open()? Thank you,

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• jQuery: Scroll the window then addClass() - how to callback

  - by carillonator

  Inside a jQuery event handler, I would like to scroll the window and then add a class to something. This is my code: $('#foo').click(function() { window.scrollTo(y); $('#bar').addClass('active'); }); $(window).scroll(function() { $('#bar').removeClass('active'); }); Notice I have another handler to remove that same class whenever the window is scrolled. The scrolling part works fine, but seems to run asynchronously, so removeClass() happens after addClass() but before the scrolling is finished. I don't know how to do this in plain javascript. I know there is a jQuery scrollTop() function that does the same thing (but seems to have cross-browser issues), but it doesn't accept a callback. What I really need is a callback to add the class after the scrolling is finished. thanks!

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• In the context of an asp.net website, what's the most efficient way to check whether a User has acce

  - by scaramouch

  I have a webpage that you pass in an id parameter (via a querystring), which it then uses to fetch data from a database. Typically, a user would navigate to this page from another page that lists only those records that the user has access to. However, if they go directly to the page by typing in the URL in the Address Bar, they can effectively view any record they like. Eg. If they were to type something like http://localhost/TestSite/ClientAdmin/ManageLocation.aspx?LocationID=5 into their Address Bar, they can access the database record with the LocationID equal to five - even though they shouldn't have access to it. Now, I could solve this by doing a database check every time the page is loaded to see whether the current user has access to the record they're trying to view. However this doesn't seem very efficient given that in most cases a user won't be trying to access a record that isn't theirs. Does anyone have a better suggestion? Thanks.

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• UISearchBarDisplayController - Fixed SearchBar

  - by slik

  I've been trying to get UISearchBarDisplayController to not animate, and stay fixed below the navigation bar. Is this even possible, I've been getting some weird results. This is all configured through a storyboard. I am just trying to figure out If I should just create my own implementation of UISearchBarDisplayController since it kinda seems a little impossible to customize it to my need. Clicking the search box When I start searching the top has extra paddding (20pt). It's assuming its on top of the origin y: 0 to prevent overlapping of status bar. I can't click outside or the cancel, x buttons. What happens If I click cancel, before searching

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• is the + in += on a Map a prefix operator of =?

  - by Steve

  In the book "Programming in Scala" from Martin Odersky there is a simple example in the first chapter: var capital = Map("US" -> "Washington", "France" -> "Paris") capital += ("Japan" -> "Tokyo") The second line can also be written as capital = capital + ("Japan" -> "Tokyo") I am curious about the += notation. In the class Map, I didn't found a += method. I was able to the same behaviour in an own example like class Foo() { def +(value:String) = { println(value) this } } object Main { def main(args: Array[String]) = { var foo = new Foo() foo = foo + "bar" foo += "bar" } } I am questioning myself, why the += notation is possible. It doesn't work if the method in the class Foo is called test for example. This lead me to the prefix notation. Is the + a prefix notation for the assignment sign (=)? Can somebody explain this behaviour?

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• Can I dynamically adjust the height of a css set div border?

  - by Jeff

  Ok so I have a div that contains a few forms that have dynamically generated content. There are categories, that if you click on, slide/toggle down to reveal that categories sub-contents, or projects. Right now, I have it setup so that if the height of the div expands to exceed a set amount, a scroll bar shows up at the side, and the user can scroll down and see the content. NOW I am being asked to get rid of the scroll bar, and just have the div's border (which is just 1px set in the css) height adjust dynamically with the height of the div's content...can I even do that? Is there some sort of jquery animation that would allow that? A point in the right direction would be greatly appreciated!! Thanks

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• Symfony on virtual host (document root problem)

  - by Martin Sikora

  Hello, I'm developing an application in Symfony and on localhost (XAMPP) I want to simulate the same conditions as on the webserver. The web server is configured as follows: /www => mydomain.com /foo => foo.mydomain.com /bar => bar.mydomain.com ... I'm going to put my Symfony application into /www direcotry so there'll be: /www /www/apps /www/apps/frontend /www/apps/frontend/... /www/apps/backend /www/apps/backend/... /www/cache /www/config ... and so on... /www/web The thing is that the document root is still set to the /www directory but Symfony expects it in the /www/web. Of course it will work if I call http://mydomain.com/web but I guess you understand this is quiet stupid solution. So my question is: Is there any way how can I change/bypass the default document root setting using .htaccess or whatever?

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• Setting the size of a silverlight window at runtime automatically?

  - by dilbert789

  I need to be able to change the size of my Silverlight object at run time because I have content that changes in size dramatically between pages, and I'd rather not show a Silverlight scroll bar inside the browser scroll bar. I was able to do the following to get it to work: In the aspx page hosting the silverlight control: - Set your Div to the starting size you need it to be - Set the Silverlight Obejct to width=”100%” height=”100%” In your Main page add this: public static void ChangeSize(string height) { var myDiv = HtmlPage.Plugin.Parent; while (myDiv.TagName != "div") myDiv = myDiv.Parent; myDiv.SetStyleAttribute("height", height); } Anywhere you want to now change the size of the page do this: string newHeight = (App.Current.Host.Content.ActualHeight + 75).ToString(); MainPage.ChangeSize(newHeight + "px"); //App.Current.Host.Content.ActualHeight will get the current actual height of the object Is there a way that I can set this to re-size automatically so that I do not have to specify the amount to change? Currently using SL 2, interested in if there is another way in a different version though.

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• Selecting dictionary items by key efficiently in Python

  - by user248237

  suppose I have a dictionary whose keys are strings. How can I efficiently make a new dictionary from that which contains only the keys present in some list? for example: # a dictionary mapping strings to stuff mydict = {'quux': ..., 'bar': ..., 'foo': ...} # list of keys to be selected from mydict keys_to_select = ['foo', 'bar', ...] The way I came up with is: filtered_mydict = [mydict[k] for k in mydict.keys() \ if k in keys_to_select] but I think this is highly inefficient because: (1) it requires enumerating the keys with keys(), (2) it requires looking up k in keys_to_select each time. at least one of these can be avoided, I would think. any ideas? I can use scipy/numpy too if needed.

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• Website hosting from home - IIS6 [closed]

  - by Paul

  I'm wanting to host a few websites from home, primarily because I'm using some BETA Microsoft software (.NET 4 and EF) and don't want to install it on my production server which is hosted at eukhost.com. Basically, I'm completely new to this sort of thing. So far, here is what I've done: Registered the domain name at namecheap.com (let's call it mydomain.com) Gone to "Nameserver Registration" in the panel and entered my IP address for the NS1 and NS2 records (let's say the IP is 0.0.0.0). Gone to "Domain Name Server Setup" and entered ns1.mydomain.com & ns2.mydomain.com Forwarded requests from port 80 to my internal IP (let's say 192.168.1.254) Created the website in IIS (I'm just testing with a single website so far, so have not created any host header values) Now, if I type in the IP address (http://0.0.0.0) I get the site as expected. However, if I enter http://www.mydomain.com I get an error saying "DNS Error - Cannot find server". I'm aware that there is a service from DynDNS that will automatically change the IP if I have a dynamic address, however my IP has remained static since I installed the ISP (since October) so I don't need this. Is there any way that I can get the DNS to work just by configuring IIS or something in Windows? I don't really want to have to pay for any 3rd party service. Thanks,

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• Question about r-value in C++0x

  - by Goofy

  Rvalues IMHO are great improvement in C++, but at the beginning the're seems quite. Please look at code below: #include <string> std::string && foo (void) { std::string message ("Hello!"); return std::move (message); } void bar (const std::string &message2) { if (message == "Bye Bye!") return; } int main () { bar (foo ()); } Reference message2 is last owner of original message object returned by foo(), right?

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• An array of structures in C...

  - by 00010000

  For the life of me I can't figure out the proper syntax for creating an array of structures in C. I tried this: struct foo { int x; int y; } foo[][] = { { { 1, 2 }, { 4, 5 }, { -1, -1 } }, { { 55, 44 } { 100, 200 }, } }; So for example foo[1][0].x == 100, foo[0][1].y == 5, etc. But GCC spits out a lot of errors. If anyone could provide the proper syntax that'd be great. EDIT: Okay, I tried this: struct foo { const char *x; int y; }; struct foo bar[2][] = { { { "A", 1 }, { "B", 2 }, { NULL, -1 }, }, { { "AA", 11 }, { "BB", 22 }, { NULL, -1 }, }, { { "ZZ", 11 }, { "YY", 22 }, { NULL, -1 }, }, { { "XX", 11 }, { "UU", 22 }, { NULL, -1 }, }, }; But GCC gives me "elements of array bar have incomplete type" and "excess elements in array initializer".

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• Problem in to navigate on UITableView on the UIButtonClick which is present in UITabBarController sc

  - by Rajendra Bhole

  Hi, I develop an application in which i want to on UIButton Click the application navigate on UITableViewcontroller class.The UIButton is already on UITabBarController during the navigation the tab bar should be visible.The calling method in first tab bar controller class is, [appDelegate.nvcHome pushViewController:itemMenuTable animated:YES]; [itemMenuTable release]; itemMenuTable = nil; But it given me the following problem in GDB, Application tried to push a nil view controller on target . Also i want to display the icon and title of UITabBarController in programmatically, the code is, homeViewControllerLink = [[homeViewController alloc]initWithNibName:@"homeViewController" bundle:nil]; nvcHome = [[UINavigationController alloc]initWithRootViewController:homeViewControllerLink]; nvcHome.navigationBar.barStyle = UIStatusBarStyleBlackOpaque; UIImage *imgHomeTab = [UIImage imageNamed:@"home"]; [nvcHome.tabBarItem initWithTitle:@"Home" image:imgHomeTab tag:101]; [homeViewControllerLink release]; But it does not display when i running my app on iphone simulator.

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• Printing Script Codes.

  - by Spelljack

  I wanna print out script's codes after the output. The script goes on different ways on the way it calls. So i wanna see it when script runs. is there any function that prints all script codes as the way it writed. Example: $foo = "bar"; $foo .= " is my bar"; function foobar() { // do some stuff here } i wanna see the codes just like this. is there a way to do this? without file_get_contents(), file(), readfile() functions?

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