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John Carmack's Unusual Fast Inverse Square Root (Quake III)

...) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why this works so much faster than the regular implementation? ...
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C dynamically growing array

...hat is). There's no built-in dynamic array in C, you'll just have to write one yourself. In C++, you can use the built-in std::vector class. C# and just about every other high-level language also have some similar class that manages dynamic arrays for you. If you do plan to write your own, here's so...
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How to convert the ^M linebreak to 'normal' linebreak in a file opened in vim?

...Why did this get a downvote? It works, even when your file is mashed onto one line because it's got the wrong line end. – Paul Tomblin May 1 '09 at 13:12 2 ...
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Invalid argument supplied for foreach()

... How about this one? lot cleaner and all in single line. foreach ((array) $items as $item) { // ... } share | improve this answer ...
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MySQL get row position in ORDER BY

...oth have a position of 2 when the first query will give a position of 2 to one of them, and 3 to the other... share | improve this answer | follow | ...
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Xcode doesn't see my iOS device but iTunes does

...lve your problem then from your project settings, set deployment target to one which your app is developed for or lesser. Otherwise there is some issue with certificates and provisioning profiles. Make sure your device's UDID is added in the provisioning profile you are using. ...
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Spring boot @ResponseBody doesn't serialize entity id

... If one were to use the first block of code, what directory and file might it go into? – David Krider Aug 28 '18 at 21:45 ...
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How do I get the current time zone of MySQL?

Anyone knows if there is such a function in MySQL? 17 Answers 17 ...
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Open a folder using Process.Start

...e other folder) Process.Start("explorer.exe", @"c:\does_not_exist"); If none of these (well, except the one that throws an exception) work on your computer, I don't think that the problem lies in the code, but in the environment. If that is the case, I would try one (or both) of the following: O...
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HTML5 Email Validation

...on email addresses -- for instance, it rejects email addresses that have a one- or two-letter username, or which are hosted at a one-letter domain name. – duskwuff -inactive- Nov 20 '16 at 4:51 ...