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PHP session lost after redirect
...written anywhere
Make sure you redirect to the same domain. So redirecting from a www.yourdomain.com to yourdomain.com doesn't carry the session forward.
Make sure your file extension is .php (it happens!)
Now, these are the most common mistakes, but if they didn't do the trick, the problem is mos...
Find size of an array in Perl
...oks quite clear alone like this, but I find that the extra line takes away from clarity when part of other code. It's useful for teaching what @array does in scalar context, and maybe if you want to use $size more than once.
...
Are fluid websites worth making anymore? [closed]
...r users don't even KNOW HOW to zoom in the browser! Most users are so far from the understanding of computers that we have. We always have to remember that fact.
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Using “super” in C++
... private, to avoid the problem when the 'inherited' is erroneously omitted from a class but a subclass tries to use it.
class MyClass : public MyBase
{
private: // Prevents erroneous use by other classes.
typedef MyBase inherited;
...
My standard 'code template' for creating new classes includ...
Get mouse wheel events in jQuery?
...
Not especially. From what I've seen, many people will either avoid dealing with scroll tracking, or they'll use a timer instead (e.g. check the user's position on the page every x milliseconds, etc). If there's a more performant solution ou...
How to crop an image using C#?
...an use Graphics.DrawImage to draw a cropped image onto the graphics object from a bitmap.
Rectangle cropRect = new Rectangle(...);
Bitmap src = Image.FromFile(fileName) as Bitmap;
Bitmap target = new Bitmap(cropRect.Width, cropRect.Height);
using(Graphics g = Graphics.FromImage(target))
{
g.Dra...
Equivalent C++ to Python generator pattern
...ist in C++, just under another name: Input Iterators. For example, reading from std::cin is similar to having a generator of char.
You simply need to understand what a generator does:
there is a blob of data: the local variables define a state
there is an init method
there is a "next" method
ther...
Different types of thread-safe Sets in Java
...ould be an example, but these are not really sets, and should be only used from the EDT anyway.)
2) Collections.synchronizedSet will simply wrap a synchronized-block around each method of the original set. You should not access the original set directly. This means that no two methods of the set ca...
How do I split a string by a multi-character delimiter in C#?
...
http://msdn.microsoft.com/en-us/library/system.string.split.aspx
Example from the docs:
string source = "[stop]ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]";
string[] stringSeparators = new string[] {"[stop]"};
string[] result;
// ...
result = source.Split(stringSeparators, StringSplitO...
Is 'switch' faster than 'if'?
... I'm not sure which.
EDIT 2014: There has been some discussion elsewhere from people familiar with the LLVM optimizer saying that the jump table optimization can be important in many scenarios; e.g. in cases where there is an enumeration with many values and many cases against values in said enume...