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Which, if any, C++ compilers do tail-recursion optimization?
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edited Jul 4 '18 at 10:53
answered Aug 29 '08 at 7:40
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Best way to work with transactions in MS SQL Server Management Studio
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answered Feb 3 '09 at 10:27
John SansomJohn Sansom
38.6k88 gold badges6767 silver badges8080 bronze badges
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Rails detect if request was AJAX
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edited Jul 10 '15 at 16:46
answered Nov 22 '11 at 1:08
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How to sum up elements of a C++ vector?
...e C++0x lambda.
– Ben Voigt
Jul 11 '10 at 4:04
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Why do your lambda examples use for_each? accumu...
How can I check the size of a collection within a Django template?
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How would you compare jQuery objects?
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answered Mar 13 '10 at 2:01
Christian C. SalvadóChristian C. Salvadó
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Why does direction of index matter in MongoDB?
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Should I use a data.frame or a matrix?
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user8341user8341
10711 bronze badge
3
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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...
conditional unique constraint
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edited Jun 10 at 16:37
answered Mar 1 '11 at 0:37
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