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GCC dump preprocessor defines

...nstead of the normal output, generate a list of `#define' directives for all the macros defined during the execution of the preprocessor, including predefined macros. This gives you a way of finding out what is predefined in your version of the preprocessor. Assuming you have no file...
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Python unittest - opposite of assertRaises?

...the correct solution in fact. The solution proposed by user9876 is conceptually flawed: if you test for the non-raising of say ValueError, but ValueError is instead raised, your test must exit with a failure condition, not an error one. On the other hand, if in running the same code you would raise ...
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How to invoke the super constructor in Python?

In all other languages I've worked with the super constructor is invoked implicitly. How does one invoke it in Python? I would expect super(self) but this doesn't work. ...
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How to import the class within the same directory or sub directory?

I have a directory that stores all the .py files. 13 Answers 13 ...
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How to make inline functions in C#

...=> x + y; void print(int x) { Console.WriteLine(x); } There are basically two different types for these: Func and Action. Funcs return values but Actions don't. The last type parameter of a Func is the return type; all the others are the parameter types. There are similar types with different...
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Multiple linear regression in Python

...as some other model evaluation criteria. If you want the stuff like in Akavall's answer, statsmodels has some more R-like diagnostics. – djs Mar 17 '16 at 18:56 ...
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What is a “callable”?

...t's clear what a metaclass is , there is an associated concept that I use all the time without knowing what it really means. ...
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How to create a video from images with FFmpeg?

...pix_fmt yuv420p out.ogg Your images should of course be sorted alphabetically, typically as: 0001-first-thing.jpg 0002-second-thing.jpg 0003-and-third.jpg and so on. I would also first ensure that all images to be used have the same aspect ratio, possibly by cropping them with imagemagick or n...
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How do I check for C++11 support?

...t have (partial) compiler-level support versus a standard C++ library with all the C++11 changes. So Boost's defines mentioned in another answer remain the only sane way to figure out if there is, for example, support for C++11 threads and other specific parts of the standard. ...
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Do I need to disable NSLog before release Application?

... get debug messages. When you're ready to release a beta or final release, all those DLog lines automatically become empty and nothing gets emitted. This way there's no manual setting of variables or commenting of NSLogs required. Picking your build target takes care of it. ...