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What exactly does the “u” do? “git push -u origin master” vs “git push origin master”
...fault yourself, git push only uses the upstream branch configuration to decide which remote to push to, not the remote branch to update.
– Mark Longair
Apr 18 '11 at 5:20
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Ajax using https on an http page
...hus subject to crossdomain JS restrictions.
JSON callbacks may let you avoid this.
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Does const mean thread-safe in C++11?
...const is now the equivalent of Java's synchronized?
No. Not at all...
Consider the following overly simplified class representing a rectangle:
class rect {
int width = 0, height = 0;
public:
/*...*/
void set_size( int new_width, int new_height ) {
width = new_width;
hei...
CURL to access a page that requires a login from a different page
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I did not know about this feature buried in those awesome tools. Super useful!
– Timothy C. Quinn
Jul 15 at 19:06
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Does a const reference class member prolong the life of a temporary?
...in your example is bound to the constructor's argument n, and becomes invalid when the object n is bound to goes out of scope.
The lifetime extension is not transitive through a function argument. §12.2/5 [class.temporary]:
The second context is when a reference is bound to a temporary. The te...
How to git-svn clone the last n revisions from a Subversion repository?
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SVN uses consecutive integers to identify revisions, making it even more trivial to walk back n commits ...
– harmic
Apr 20 '17 at 1:15
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How to overload the operator++ in two different ways for postfix a++ and prefix ++a?
...ric: You have it correct all the way through apart from a sentence in the middle where you mix. Its prefix that is better.
– Martin York
Oct 2 '10 at 19:10
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Array include any value from another array?
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(cheeses & foods).empty?
As Marc-André Lafortune said in comments, & works in linear time while any? + include? will be quadratic. For larger sets of data, linear time will be faster. For small data sets, any? + include? may be faster as shown by Lee Jarvis' answer -- pro...
What is the difference between lock and Mutex?
...h for the common case.
The Monitor (and the lock keyword) are, as Darin said, restricted to the AppDomain. Primarily because a reference to a memory address (in the form of an instantiated object) is required to manage the "lock" and maintain the identity of the Monitor
The Mutex, on the other ha...
What does gcc's ffast-math actually do?
... --ffast-math flag can greatly increase speed for float ops, and goes outside of IEEE standards, but I can't seem to find information on what is really happening when it's on. Can anyone please explain some of the details and maybe give a clear example of how something would change if the flag was ...