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Why does Math.round(0.49999999999999994) return 1?
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Summary
In Java 6 (and presumably earlier), round(x) is implemented as floor(x+0.5).1 This is a specification bug, for precisely this one pathological case.2 Java 7 no longer mandates this broken implementation.3
The problem
0.5+0.49999999...
How can I get the DateTime for the start of the week?
How do I find the start of the week (both Sunday and Monday) knowing just the current time in C#?
32 Answers
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javascript scroll event for iPhone/iPad?
... stops panning—an onscroll event is generated when the page stops moving and redraws—as shown in Figure 6-1.
Similarly, scroll with 2 fingers fires onscroll only after you've stopped scrolling.
The usual way of installing the handler works e.g.
window.addEventListener('scroll', f...
Get size of folder or file
...using the listFiles() method of a file object that represents a directory) and accumulate the directory size for yourself:
public static long folderSize(File directory) {
long length = 0;
for (File file : directory.listFiles()) {
if (file.isFile())
length += file.length(...
How do I sort a list by different parameters at different timed
...ms. I like the elegant combination you do with the enums, the "descending" and the "Composite". I guess the null values treatment is missing, but it's easy to add the same way as "descending".
– KLE
Sep 15 '09 at 7:48
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What's the strangest corner case you've seen in C# or .NET? [closed]
I collect a few corner cases and brain teasers and would always like to hear more. The page only really covers C# language bits and bobs, but I also find core .NET things interesting too. For example, here's one which isn't on the page, but which I find incredible:
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How do I suspend painting for a control and its children?
...ke to completely prevent it from redrawing while I do that - SuspendLayout and ResumeLayout aren't enough. How do I suspend painting for a control and its children?
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Styles.Render in MVC4
... I dont get it....why go to all the trouble to create bundles and add those paths to these crazy classes in MVC when you can simply add a CSS <link> to the file in your web page? If you add all your CSS links to your style sheets in say a layout file or a partial view you can mana...
How to write iOS app purely in C
...ssage.h>
// This is a hack. Because we are writing in C, we cannot out and include
// <UIKit/UIKit.h>, as that uses Objective-C constructs.
// however, neither can we give the full function declaration, like this:
// int UIApplicationMain (int argc, char *argv[], NSString *principalClassN...