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Putting a simple if-then-else statement on one line [duplicate]
...know is guaranteed (but didn't check). And though terse, it isn't going to win any readability awards. You can also do "abcdefg"[i] in C, but it doesn't mean you should.
– msw
May 10 '10 at 15:27
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Get a filtered list of files in a directory
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I'm always a bit wary of code in answers which obviously hasn't been run or can't run. The variable included_extensions vs included_extentsions? A pity because otherwise this is my preferred answer.
– Auspice
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Cell spacing in UICollectionView
... maybe I do something wrong or this idea is not working for 100%, because when I scroll to the end I see that some cells are overlay each other :(
– pash3r
Mar 5 '16 at 10:19
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Can I zip more than two lists together in Scala?
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I don't believe it's possible to generate a list of tuples of arbitrary size, but the transpose function does exactly what you need if you don't mind getting a list of lists instead.
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How to add a 'or' condition in #ifdef
... defined(CONDITION1) || defined(CONDITION2)
should work. :)
#ifdef is a bit less typing, but doesn't work well with more complex conditions
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hasNext in Python iterators?
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Like __init__ and __main__ ? Imho, its a bit of a mess no matter you try to justify it.
– user1363990
Aug 22 '17 at 1:50
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Numpy: find first index of value fast
...1 million elements and tests were run 100 times. Results still fluctuate a bit, but the qualitative trend is clear: Python and f2py quit at the first element so they scale differently. Python gets too slow if the needle is not in the first 1%, whereas f2py is fast (but you need to compile it).
To s...
Django filter versus get for single object?
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I'm a bit late to the party, but with Django 1.6 there is the first() method on querysets.
https://docs.djangoproject.com/en/dev/ref/models/querysets/#django.db.models.query.QuerySet.first
Returns the first object matched by...
ReactJS state vs prop
...te for those reading this in 2018 or later:
React has evolved quite a bit since this answer was written, especially with the introduction of Hooks. However, the underlying state management logic from this example remains the same, and more importantly, the benefits that you get from keeping you...
Manually raising (throwing) an exception in Python
...ror('A very specific bad thing happened')
which also handily allows an arbitrary number of arguments to be passed to the constructor:
raise ValueError('A very specific bad thing happened', 'foo', 'bar', 'baz')
These arguments are accessed by the args attribute on the Exception object. For exam...