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  • My application crashes on device

    - by Fazalyazdan
    hi i am new to iphone development and currently i am working on client server applications but the application run and work good on simulator but when i try it on device then the application crash after some times .Now i dont know why this will happend because i release every object which are decalre with alloc or init.but still crash on device . My application are like (Rate My puppy application)which are store on apple store . please help me if any one have the solutions .

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  • Multiple key presses doing different events in C#

    - by Nevik Eeirnb
    Hi, private void Form1_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.W) player1.moveUp(); if (e.KeyCode == Keys.NumPad8) player2.moveUp(); } In the above code the moveUp methods basically just increment a value. I want it so both keys can be pressed (or held down)at the same time and both events will trigger. Thanks, Nevik

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  • How to see if type is instance of a class in Haskell?

    - by Raekye
    I'm probably doing this completely wrong (the unhaskell way); I'm just learning so please let me know if there's a better way to approach this. Context: I'm writing a bunch of tree structures. I want to reuse my prettyprint function for binary trees. Not all trees can use the generic Node/Branch data type though; different trees need different extra data. So to reuse the prettyprint function I thought of creating a class different trees would be instances of: class GenericBinaryTree a where is_leaf :: a -> Bool left :: a -> a node :: a -> b right :: a -> a This way they only have to implement methods to retrieve the left, right, and current node value, and prettyprint doesn't need to know about the internal structure. Then I get down to here: prettyprint_helper :: GenericBinaryTree a => a -> [String] prettyprint_helper tree | is_leaf tree = [] | otherwise = ("{" ++ (show (node tree)) ++ "}") : (prettyprint_subtree (left tree) (right tree)) where prettyprint_subtree left right = ((pad "+- " "| ") (prettyprint_helper right)) ++ ((pad "`- " " ") (prettyprint_helper left)) pad first rest = zipWith (++) (first : repeat rest) And I get the Ambiguous type variable 'a0' in the constraint: (Show a0) arising from a use of 'show' error for (show (node tree)) Here's an example of the most basic tree data type and instance definition (my other trees have other fields but they're irrelevant to the generic prettyprint function) data Tree a = Branch (Tree a) a (Tree a) | Leaf instance GenericBinaryTree (Tree a) where is_leaf Leaf = True is_leaf _ = False left (Branch left node right) = left right (Branch left node right) = right node (Branch left node right) = node I could have defined node :: a -> [String] and deal with the stringification in each instance/type of tree, but this feels neater. In terms of prettyprint, I only need a string representation, but if I add other generic binary tree functions later I may want the actual values. So how can I write this to work whether the node value is an instance of Show or not? Or what other way should I be approaching this problem? In an object oriented language I could easily check whether a class implements something, or if an object has a method. I can't use something like prettyprint :: Show a => a -> String Because it's not the tree that needs to be showable, it's the value inside the tree (returned by function node) that needs to be showable. I also tried changing node to Show b => a -> b without luck (and a bunch of other type class/preconditions/whatever/I don't even know what I'm doing anymore).

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  • operator[][] C++

    - by bobobobo
    I'd like to overload operator[][] to give internal access to a 2D array of char in C++. Right now I'm only overloading operator[], which goes something like class Object { char ** charMap ; char* operator[]( int row ) { return charMap[row] ; } } ; It works ok.. Is it possible to override operator[][] though?

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  • Help With Generics? How to Define Generic Method?

    - by DaveDev
    Is it possible to create a generic method with a definition similar to: public static string GenerateWidget<TypeOfHtmlGen, WidgetType>(this HtmlHelper htmlHelper , object modelData) // TypeOfHtmlGenerator is a type that creates custom Html tags. // GenerateWidget creates custom Html tags which contains Html representing the Widget. I can use this method to create any kind of widget contained within any kind of Html tag. Thanks

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  • Live Wallpaper Engine Abstraction

    - by user1459142
    I am trying to obtain an instance of my live wallpaper engine in another class, here is my code... In the other class: WallpaperEngine wpe = (WallpaperEngine) LiveWallpaperService.onCreateEngine(); In LiveWallpaperService: @Override public Engine onCreateEngine() { // TODO Auto-generated method stub return new WallpaperEngine(); } But when I refer to an object in my engine (i.e, "wpe.variable"), I get a NullPointerException and the wallpaper force closes.

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  • IE Problem in jQuery

    - by venkatachalam
    I am using the jQuery plugin Cross Slide. My page is working fine in Chrome and Firefox. But in IE 7, I get: Debug error as Object expected on line 1: $(document).ready(function() { $('#image').crossSlide({sleep:4,fade:1},[{src:'images/1.jpg'},{src:'images/2.jpg'}]); }); How can I fix bug in IE 8 & 7?

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  • LINQ Query with 3 levels

    - by BahaiResearch.com
    I have a business object structured like this: Country has States, State has Cities So Country[2].States[7].Cities[5].Name would be New York Ok, I need to get a list of all the Country objects which have at least 1 City.IsNice == true How do I get that?

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  • Accessing Extension Objects

    - by LB
    I've added an object to the XsltArgumentList. I was wondering how I could access and display it in my transformation? xslarg.AddExtensionObject("someKey", "someValue"); However, when I transform, I wan't to be able to display "someValue". Any idea how? Thanks.

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  • converting timestamp to nanoseconds

    - by kuki
    I have a certain value of date and time say 28-3-2012(date) - 10:36:45(time) . I wish to convert this whole timestamp to nanoseconds with the precision of nanoseconds. As in the user would input the time and date as shown but internally i have to be accurate upto nanoseconds and convert the whole thing to nanoseconds to form a unique key assigned to a specific object created at that particular time. Could some one please help me with the same..

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  • [MSVC++] Breakpoints on a variable changing value?

    - by John
    I'm chasing a bug where a member value of an object seems to magically change, without any methods being called which modify it. No doubt something obvious but proving hard to track down. I know I can put conditional break-points in methods based on the variable value, but is it in any way possible to actually put a breakpoint on a variable itself? e.g a breakpoint which fires when x==4? I know I can put watches on, what about breakpoints?

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  • Visual DataFlex: call WebService from the web page

    - by globus
    I have the web service and generated class for it. I can use this generated class in windows application as it described in Help. The question is: how can I use this generated class in the web project? (the analogous actions - creating object and use its functions -, as it was in windows app, are not worked)

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