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Why do you have to link the math library in C?
...mentations in libc.so (or libc.a for static linking), which is linked into your executable by default (as if -lc were specified). GCC can be instructed to avoid this automatic link with the -nostdlib or -nodefaultlibs options.
The math functions in math.h have implementations in libm.so (or libm.a...
Which iOS app version/build number(s) MUST be incremented upon App Store release?
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Apple Technical Note TN2420, Version Numbers and Build Numbers
Summary:
The pair (Version, Build number) must be unique.
The sequence is valid: (1.0.1, 12) -> (1.0.1, 13) -> (1.0.2, 13) -> (1.0.2, 14) ...
Version (CFBundleShortVersionString) must be in ascending sequential order...
Find unmerged Git branches?
I have a Git repository with many branches, some of them already merged and some not. Since the number of branches is quite large, how can I determine which branches have not yet been merged? I would like to avoid having to do an "octopus" merge and re-merging branches that have already been merged....
Why isn't vector a STL container?
Item 18 of Scott Meyers's book Effective STL: 50 Specific Ways to Improve Your Use of the Standard Template Library says to avoid vector <bool> as it's not an STL container and it doesn't really hold bool s.
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How does MongoDB sort records when no sort order is specified?
When we run a Mongo find() query without any sort order specified, what does the database internally use to sort the results?
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Algorithm to detect corners of paper sheet in photo
What is the best way to detect the corners of an invoice/receipt/sheet-of-paper in a photo? This is to be used for subsequent perspective correction, before OCR.
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How can I extract a good quality JPEG image from a video file with ffmpeg?
Currently I am using this command to extract the images:
2 Answers
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Why must a nonlinear activation function be used in a backpropagation neural network? [closed]
...gs on neural networks and I understand the general principle of a single layer neural network. I understand the need for aditional layers, but why are nonlinear activation functions used?
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What is the difference between a definition and a declaration?
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A declaration introduces an identifier and describes its type, be it a type, object, or function. A declaration is what the compiler needs to accept references to that identifier. These are declarations:
extern int bar;
extern int g(int, int);
double f(int, double); // extern can ...
How to change the color of an svg element?
... color but so far I haven't been able to do so. I put this in the css but my image is always black, no matter what. My code:
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