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In Postgresql, force unique on combination of two columns
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edited Jan 8 '13 at 18:44
answered Jan 8 '13 at 18:38
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How to use a different version of python during NPM install?
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ackack
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How do I lowercase a string in Python?
... Alan W. Smith
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answered Jul 23 '11 at 3:09
Petar IvanovPetar Ivanov
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Get underlying NSData from UIImage
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CarolineCaroline
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Why aren't ◎ܫ◎ and ☺ valid JavaScript variable names?
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cHao
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answered Sep 17 '11 at 0:15
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Are tuples more efficient than lists in Python?
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jQuery - Create hidden form element on the fly
...round.
– Roy Tinker
Oct 6 '11 at 4:18
4
Also, jQuery documentation suggests that since DOM manipu...
How to sort two lists (which reference each other) in the exact same way
...ps = zip(list1, list2); tups.sort(); zip(*tups)
100000 loops, best of 3: 2.84 us per loop
On the other hand, for larger lists, the one-line version could be faster:
>>> %timeit zip(*sorted(zip(list1, list2)))
100 loops, best of 3: 8.09 ms per loop
>>> %timeit tups = zip(list1, l...
Ruby/Rails: converting a Date to a UNIX timestamp
...xample:
>> Date.new(2009,11,26).to_time
=> Thu Nov 26 00:00:00 -0800 2009
>> Date.new(2009,11,26).to_time.to_i
=> 1259222400
>> Time.at(1259222400)
=> Thu Nov 26 00:00:00 -0800 2009
Note that the intermediate DateTime object is in local time, so the timestamp might be a...
The modulo operation on negative numbers in Python
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