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The written versions of the logical operators
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answered Mar 4 '10 at 2:11
GManNickGGManNickG
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Filtering a list based on a list of booleans
...True, False, True, False]
>>> %timeit list(compress(list_a, fil))
100000 loops, best of 3: 2.58 us per loop
>>> %timeit [i for (i, v) in zip(list_a, fil) if v] #winner
100000 loops, best of 3: 1.98 us per loop
>>> list_a = [1, 2, 4, 6]*100
>>> fil = [True, False...
Why `null >= 0 && null
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answered May 26 '10 at 6:39
Christian C. SalvadóChristian C. Salvadó
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Checking for a null int value from a Java ResultSet
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Is explicitly closing files important?
...nekDima Tisnek
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Declaring an enum within a class
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answered Mar 23 '10 at 21:42
Peter AlexanderPeter Alexander
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What Does 'Then' Really Mean in CasperJS
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edited Nov 10 '12 at 7:05
answered Aug 14 '12 at 17:51
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SQL update trigger only when column is modified
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answered Aug 27 '12 at 12:10
mehdi lotfimehdi lotfi
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Check if key exists and iterate the JSON array using Python
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105
If all you want is to check if key exists or not
h = {'a': 1}
'b' in h # returns False
If y...
conditional unique constraint
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edited Jun 10 at 16:37
answered Mar 1 '11 at 0:37
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