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What does -D_XOPEN_SOURCE do/mean?

...h as Windows. The numbers refer to different versions of the standard. 500 - X/Open 5, incorporating POSIX 1995 600 - X/Open 6, incorporating POSIX 2004 700 - X/Open 7, incorporating POSIX 2008 You can tell which one you need (if any) by looking at the man page for each function you call. For ...
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Rails: how do I validate that something is a boolean?

... Luca Spiller 2,01833 gold badges2222 silver badges2828 bronze badges answered Jan 18 '11 at 7:38 Drew Dara-AbramsDre...
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How to format all Java files in an Eclipse project at one time?

...Eclipse 3.8.1. – Jason McVetta Jun 10 '13 at 22:18 1 +1 selecting the project seems to work in ec...
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Does Git Add have a verbose switch

...| edited Feb 28 '19 at 12:00 B--rian 4,11777 gold badges2525 silver badges5252 bronze badges answered Se...
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How do you manually execute SQL commands in Ruby On Rails using NuoDB

... | edited Jan 23 '19 at 10:24 Jan Klimo 3,42911 gold badge2727 silver badges3737 bronze badges answered...
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PHP - Get bool to echo false when false

... answered Feb 9 '11 at 18:05 Dan GrossmanDan Grossman 48.1k1010 gold badges100100 silver badges9494 bronze badges ...
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Difference between std::result_of and decltype

I have some trouble understanding the need for std::result_of in C++0x. If I understood correctly, result_of is used to obtain the resulting type of invoking a function object with certain types of parameters. For example: ...
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async await return Task

... | edited Oct 20 '15 at 19:52 bashis 79011 gold badge1010 silver badges2929 bronze badges ans...
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How do you use https / SSL on localhost?

...and assign the start URL - put the new https with the new port (usually 44301 - notice the similarity to port 443) and your project will start correctly from then on. share | improve this answer ...
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What is the proper way to URL encode Unicode characters?

...n percent-encode those values. This requirement was introduced in January 2005 with the publication of RFC 3986. URI schemes introduced before this date are not affected. It seems like because there were other accepted ways of doing URL encoding in the past, browsers attempt several methods of dec...