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Are lists thread-safe?
...y attempts to concurrently access, the lists's data is not protected. For example:
L[0] += 1
is not guaranteed to actually increase L[0] by one if another thread does the same thing, because += is not an atomic operation. (Very, very few operations in Python are actually atomic, because most of t...
NSURLRequest setting the HTTP header
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Excellent answer! I wanted to point out that RamS's answer has nice documentation.
– fskirschbaum
Dec 13 '14 at 19:25
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What's the best way to put a c-struct in an NSArray?
...bly lighter weight than NSData for simple data structures.
Simply use an expression like the following:
[NSValue valueWithBytes:&p objCType:@encode(Megapoint)];
And to get the value back out:
Megapoint p;
[value getValue:&p];
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BASH copy all files except one
I would like to copy all files out of a dir except for one named Default.png. It seems that there are a number of ways to do this. What seems the most effective to you?
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How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?
...ile. Here is the result:
+ (NSArray*)getRGBAsFromImage:(UIImage*)image atX:(int)x andY:(int)y count:(int)count
{
NSMutableArray *result = [NSMutableArray arrayWithCapacity:count];
// First get the image into your data buffer
CGImageRef imageRef = [image CGImage];
NSUInteger width ...
Generating all permutations of a given string
... about longer string such as abcdefgh ? Is there any Java implementation example?
52 Answers
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Fastest way to extract frames using ffmpeg?
Hi I need to extract frames from videos using ffmpeg.. Is there a faster way to do it than this:
6 Answers
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Where Is Machine.Config?
...assemblies to v2.0.50727 so there should be no config\machine.config. v4.5.x and v4.6.x are stored inside v4.0.30319.
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rotating axis labels in R
In R, how do I make a (bar)plot's y axis labels parallel to the X axis instead of parallel to the Y axis?
5 Answers
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Force SSL/https using .htaccess and mod_rewrite
...rtual host or directories for defending against configuration errors that expose stuff that should be protected. When this directive is present all requests are denied which are not using SSL.
This will not do a redirect to https though. To redirect, try the following with mod_rewrite in your .hta...