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How do I check OS with a preprocessor directive?

...them, with links to where they're found: Windows _WIN32   Both 32 bit and 64 bit _WIN64   64 bit only Unix (Linux, *BSD, Mac OS X) See this related question on some of the pitfalls of using this check. unix __unix __unix__ Mac OS X __APPLE__ __MACH__ Both are defined; checking for eith...
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Why is conversion from string constant to 'char*' valid in C but invalid in C++

The C++11 Standard (ISO/IEC 14882:2011) says in § C.1.1 : 3 Answers 3 ...
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How can I change Mac OS's default Java VM returned from /usr/libexec/java_home

... I think JAVA_HOME is the best you can do. The command-line tools like java and javac will respect that environment variable, you can use /usr/libexec/java_home -v '1.7*' to give you a suitable value to put into JAVA_HOME in order to make command line tools use Java 7. expor...
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CSS @font-face - what does “src: local('☺')” mean?

I'm using @font-face for the first time and downloaded a font-kit from fontsquirrel 3 Answers ...
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I don't understand -Wl,-rpath -Wl,

...Wl: gcc -Wl,aaa -Wl,bbb -Wl,ccc Note that there is no comma between aaa and the second -Wl. Or, in your case, -Wl,-rpath -Wl,.. share | improve this answer | follow ...
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Make sure only a single instance of a program is running

... The following code should do the job, it is cross-platform and runs on Python 2.4-3.2. I tested it on Windows, OS X and Linux. from tendo import singleton me = singleton.SingleInstance() # will sys.exit(-1) if other instance is running The latest code version is available singleto...
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How to install Xcode Command Line Tools

How do I get the command-line build tools installed with the current Xcode/Mac OS X v10.8 (Mountain Lion) or later? 13 Answ...
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Android Studio needs JDK 7 for Android-L mac

I was trying to look how my app looks in material design and I would like to use the new cards lib. My Problem is, that it's giving me this error within my gradle file and I need to fix that. ...
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CSS to set A4 paper size

I need simulate an A4 paper in web and allow to print this page as it is show on browser (Chrome, specifically). I set the element size to 21cm x 29.7cm, but when I send to print (or print preview) it clip my page. ...
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Redis is single-threaded, then how does it do concurrent I/O?

...pends on how you define concurrency. In server-side software, concurrency and parallelism are often considered as different concepts. In a server, supporting concurrent I/Os means the server is able to serve several clients by executing several flows corresponding to those clients with only one com...