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Is it more efficient to copy a vector by reserving and copying, or by creating and swapping? [duplic
...contrast, std::swap(a, b) would exchange their contents (so b's size would now be whatever a's had been before). You are perhaps thinking of a move operation (as occurs in C++11, but not in an ordinary assignment like this). Such a move would leave b in an, ahem, "interesting" state - see stackoverf...
Permanently add a directory to PYTHONPATH?
... down one directory further: /Users/joey/repos/specificRepo did the trick. Now python can traverse any downward directory connected to the specificRepo directory that contains a init.py !
– Qiao Yi
Mar 14 '13 at 14:29
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javascript scroll event for iPhone/iPad?
... ehm .. actually, window.onscroll is firing on my ipad all the time now, while panning, and after panning, while decelerating. did something change ?
– commonpike
Apr 21 '15 at 21:18
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How to let PHP to create subdomain automatically for each user?
...to my index.php file. So if I go to
http://fred.mywebsite.com/album/Dance/now
I get back
http://fred.mywebsite.com/index.php?uri=album/Dance/now&hostName=fred.mywebsite.com
Then in my index.php code i just explode my username off of the hostName. This gives me nice pretty SEO URLs.
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Why does the default parameterless constructor go away when you create one with parameters
...lt parameterless one goes away. I have always just accepted this fact, but now I've started wondering why.
11 Answers
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usr/bin/ld: cannot find -l
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Now that's what I call a perfect answer! Thanks a lot. It saved a lot of time. Just to add to help someone like me. It can be used to debug path related issues as well. Make sure you check the path with -L<path to director...
Installing SciPy with pip
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it's 'libatlas-base-dev 'now, instead of 'libatlas-sse2-dev'
– madCode
Jun 26 '12 at 20:38
1
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HashSet versus Dictionary w.r.t searching time to find if an item exists
...P. I already have a dictionary i'm using for other reasons, and wanted to know if i benefit from changing to a Hashset instead of using ContainsKey. Looks like the answer is no since both are so fast.
– FistOfFury
Sep 12 '12 at 19:15
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Node.js create folder or use existing
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@meawoppl, it is 'makedirectory'p. The 'p' is unknown.
– andrew
Mar 17 '15 at 16:20
4
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Why unsigned integer is not available in PostgreSQL?
...e on unused bits. If you are abusing that across another 20 tables, you're now wasting 800MB of space.
– tpartee
Mar 18 at 21:56
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