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Can I call memcpy() and memmove() with “number of bytes” set to zero?
...ent of an array? Such a pointer could not be legitimately deferenced, but one could safely do some other pointer-ish things like subtract one from it.
– supercat
Nov 20 '11 at 22:19
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Concatenating two std::vectors
...st get the number of elements each vector holds, and set vector1 to be the one holding the greatest. Should you do otherwise you're doing a lot of unnecessary copying.
– Joe Pineda
Oct 14 '08 at 16:11
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How to pass macro definition from “make” command line arguments (-D) to C source code?
...use $(CFLAGS) in your compile command in the Makefile. As @jørgensen mentioned , putting the variable assignment after the make command will override the CFLAGS value already defined the Makefile.
Alternatively you could set -Dvar=42 in another variable than CFLAGS and then reuse this variable in ...
What is the rationale behind having companion objects in Scala?
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The companion object basically provides a place where one can put "static-like" methods. Furthermore, a companion object, or companion module, has full access to the class members, including private ones.
Companion objects are great for encapsulating things like factory methods...
Is it more efficient to copy a vector by reserving and copying, or by creating and swapping? [duplic
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They aren't the same though, are they? One is a copy, the other is a swap. Hence the function names.
My favourite is:
a = b;
Where a and b are vectors.
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How to debug a referenced dll (having pdb)
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For me it was working one day but then the next day wasn't working (having DLLs and PDB files). Pressing the "Empty Symbol Cache" button on Tools > Options > Debugging > Symbols fixed it though.
– Paul
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Identifying the dependency relationship for python packages installed with pip
...dencies. This way you'll have a much nicer time the day you need to remove one of them :)
Note the following:
You can have a clean requirements.raw with version control to rebuild your full requirements.txt.
Beware of git urls being replaced by egg names in the process.
The dependencies of your d...
What is the best way to implement constants in Java? [closed]
...ava 5+.
If you have constants that are only valid to a particular class or one of its subclasses, declare them as either protected or public and place them on the top class in the hierarchy. This way, the subclasses can access these constant values (and if other classes access them via public, the ...
Git Commit Messages: 50/72 Formatting
...ger) than this plot can hold without making the interesting part look like one single line. (There’s probably some fancy statistical technique for incorporating that data here but oh well… :-)
If you want to see the raw lengths:
cd /path/to/repo
git shortlog | grep -e '^ ' | sed 's/[[:sp...
Rolling back local and remote git repository by 1 commit
...ll in the same branch. However, since the push is no longer a fast-forward one, yes, you need to force that push.
– VonC
Jul 1 '14 at 9:28
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