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What does the constant 0.0039215689 represent?

...mance reasons. Multiplying by the reciprocal is faster than repeatedly dividing by 255. Side Note: If you're wondering why such a micro-optimization isn't left to the compiler, it's because it is an unsafe floating-point optimization. In other words: x / 255 != x * (1. / 255) due to floati...
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What is the standard exception to throw in Java for not supported/implemented operations?

...ems reasonable to me. "Yet" or "never" indicated by the Exception gives an idea on how to react on this. – sschrass Feb 16 '16 at 9:16 3 ...
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JQuery to load Javascript file dynamically

... var channelOptions = { tags: "".split(" "), id: "1" }; initTagRenderer("".split(" "), "".split(" "), channelOptions); StackExchange.using("externalEditor", function() { // Have to fire editor after snippets, if snippets enabled...
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Where does Visual Studio look for C++ header files?

...aders. Btw, about what the kind of curiosity I had: I found that the MSDN didn't even knows it's own header names! I.e. they referred to Iphlpapi.h, but such a file not exist, it's name is rather iphlpapi.h, either IPHlpApi.h(both are there)! lol – Hi-Angel Sep...
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How to get the first line of a file in a bash script?

...t to read -r var <file than cat file | read anyhow, even if the latter didn't fail for the reasons described in BashFAQ #24. – Charles Duffy Aug 1 '17 at 16:21 ...
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Add zero-padding to a string

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How does bash tab completion work?

...st of possible completions, and readline inserts as much characters as are identified unambiguously by the characters already typed in. (You can configure the readline library quite much, see the section Command line editing of the Bash manual for details.) Bash itself has the built-in complete to d...
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What does the keyword Set actually do in VBA?

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ALTER DATABASE failed because a lock could not be placed on database

...t terminated. If you find any connections to the database, run KILL <SPID> where <SPID> is the SPID for the sessions that are connected to the database. Try your script after all connections to the database are removed. Unfortunately, I don't have a reason why you're seeing the prob...
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Why is UnhandledExceptionEventArgs.ExceptionObject an object and not an Exception?

...The exception could've resulted from a non-CLI compliant language which decide to throw a System.Int32. Newer versions of the CLR will auto-wrap this in System.Exception anyways but this is a setting that can be disabled – JaredPar Nov 30 '13 at 0:07 ...