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How to convert a string to lower or upper case in Ruby
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Ruby has a few methods for changing the case of strings. To convert to lowercase, use downcase:
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Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
...ed by both the C and C++ standards. For example, the C99 standard ( §6.2.5/9 ) states
5 Answers
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Case-Insensitive List Search
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As of .NET 2.0, this is now easily done - look at shaxby's answer below.
– Joe
May 28 '13 at 20:57
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Pandas aggregate count distinct
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How about either of:
>>> df
date duration user_id
0 2013-04-01 30 0001
1 2013-04-01 15 0001
2 2013-04-01 20 0002
3 2013-04-02 15 0002
4 2013-04-02 30 0002
>>> df.groupby("date").agg({"duration": np.sum, "user_id": ...
Checking if all elements in a list are unique
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answered Mar 11 '11 at 20:47
yanyan
19.1k33 gold badges3232 silver badges4747 bronze badges
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Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
...ferent sizes, a pattern came up. Invariably, transposing a matrix of size 2^n is slower than transposing one of size 2^n+1 . For small values of n , the difference is not major.
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Download a single folder or directory from a GitHub repo
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Is there an eval() function in Java? [duplicate]
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12 Answers
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In Javascript, how to conditionally add a member to an object?
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22 Answers
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How to use a filter in a controller?
...ses:
function myCtrl($scope, $filter)
{
$filter('filtername')(arg1,arg2);
}
Where arg1 is the array you want to filter on and arg2 is the object used to filter.
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