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What is the difference between atan and atan2 in C++?

... std::atan2 allows calculating the arctangent of all four quadrants. std::atan only allows calculating from quadrants 1 and 4. share | ...
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Google MAP API Uncaught TypeError: Cannot read property 'offsetWidth' of null

... This problem is usually due to the map div not being rendered before the javascript runs that needs to access it. You should put your initialization code inside an onload function or at the bottom of your HTML file, just before the tag, so th...
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Pythonic way to check if a file exists? [duplicate]

... It seems to me that all other answers here (so far) fail to address the race-condition that occurs with their proposed solutions. Any code where you first check for the files existence, and then, a few lines later in your program, you create it...
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Getting Chrome to accept self-signed localhost certificate

...tificate for the localhost CN. Firefox accepts this certificate after initially complaining about it, as expected. Chrome and IE, however, refuse to accept it, even after adding the certificate to the system certificate store under Trusted Roots. Even though the certificate is listed as correctly in...
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How to flatten tree via LINQ?

...lt;T>> f ) => e.SelectMany(c => f(c).Flatten(f)).Concat(e); Call this function like this: IEnumerable<MyNode> tree = .... var res = tree.Flatten(node => node.Elements); If you would prefer flattening in pre-order rather than in post-order, switch around the sides of the Con...
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Xcode - ld: library not found for -lPods

... After I open it, I cannot run my project at all. what should I do? – Inuyasha Jan 12 '16 at 8:39 ...
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How to remove .html from URL?

...overflow.com/a/9204355/3217306 Update: I was slightly mistaken, . matches all characters except newlines, so includes whitespace. Also, here is a helpful regex cheat sheet Sources: http://community.sitepoint.com/t/what-does-this-mean-rewritecond-request-filename-f-d/2034/2 https://mediatemple.ne...
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Unable to begin a distributed transaction

...S DTC will not be able to communicate with each other. This problem typically occurs if one of the systems were cloned using unsupported cloning tools. MS DTC requires that the systems be cloned using supported cloning tools such as SYSPREP. Running 'msdtc -uninstall' and then 'msdtc -instal...
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What is the difference between “JPG” / “JPEG” / “PNG” / “BMP” / “GIF” / “TIFF” Image?

...ey are exact representations of the image. Bitmap formats such as BMP generally are uncompressed, although there also are compressed BMP files as well. Lossy compression formats are generally suited for photographs. It is not suited for illustrations, drawings and text, as compression artifacts fro...
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How to get xdebug var_dump to show full object/array

... I contend that the a display_max_depth of 5 is not sane if you actually expect to get any information from your var_dump – Ben Harold Feb 19 '14 at 0:06 2 ...