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How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?
...ColorSpaceRelease(colorSpace);
CGContextDrawImage(context, CGRectMake(0, 0, width, height), imageRef);
CGContextRelease(context);
// Now your rawData contains the image data in the RGBA8888 pixel format.
NSUInteger byteIndex = (bytesPerRow * y) + x * bytesPerPixel;
for (int i =...
Using Linq to get the last N elements of a collection?
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collection.Skip(Math.Max(0, collection.Count() - N));
This approach preserves item order without a dependency on any sorting, and has broad compatibility across several LINQ providers.
It is important to take care not to call Skip with a negative ...
How do I find which transaction is causing a “Waiting for table metadata lock” state?
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SHOW ENGINE INNODB STATUS \G
Look for the Section -
TRANSACTIONS
We can use INFORMATION_SC...
REST API Authentication
...n how to implement:
Working Link from comments: https://www.ida.liu.se/~TDP024/labs/hmacarticle.pdf
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Cannot serve WCF services in IIS on Windows 8
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409
Seemed to be a no brainer; the WCF service should be enabled using Programs and Features -> ...
How does variable assignment work in JavaScript?
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edited Aug 11 '18 at 14:50
Volker E.
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How to generate Javadoc HTML files in Eclipse?
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edited Sep 21 '15 at 17:00
System
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answered F...
Is there a more elegant way of adding an item to a Dictionary safely?
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edited Jul 24 '09 at 13:15
answered Jul 24 '09 at 13:10
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What are these attributes: `aria-labelledby` and `aria-hidden`
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240
HTML5 ARIA attribute is what you're looking for. It can be used in your code even without boots...
How do I obtain the frequencies of each value in an FFT?
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The first bin in the FFT is DC (0 Hz), the second bin is Fs / N, where Fs is the sample rate and N is the size of the FFT. The next bin is 2 * Fs / N. To express this in general terms, the nth bin is n * Fs / N.
So if your sample rate, Fs is say 44.1 kHz a...