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How can I filter lines on load in Pandas read_csv function?
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170
There isn't an option to filter the rows before the CSV file is loaded into a pandas object.
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“git diff” does nothing
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answered Aug 27 '10 at 0:59
DouglasDouglas
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How to copy part of an array to another array in C#?
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int[] b = new int[3];
Array.Copy(a, 1, b, 0, 3);
a = source array
1 = start index in source array
b = destination array
0 = start index in destination array
3 = elements to copy
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How to check whether a string is Base64 encoded or not
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Converting of Uri to String
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Rico HarisinRico Harisin
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PHP substring extraction. Get the string before the first '/' or the whole string
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Use explode()
$arr = explode("/", $string, 2);
$first = $arr[0];
In this case, I'm using the limit parameter to explode so that php won't scan the string any more than what's needed.
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What is the wix 'KeyPath' attribute?
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edited Jan 5 '10 at 0:36
answered Jan 5 '10 at 0:29
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Transpose/Unzip Function (inverse of zip)?
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802
zip is its own inverse! Provided you use the special * operator.
>>> zip(*[('a', 1), ...
Why do we have map, fmap and liftM?
... see an error about lists than about Functors.
-- Typeclassopedia, page 20
fmap and liftM exist because monads were not automatically functors in Haskell:
The fact that we have both fmap and liftM is an
unfortunate consequence of the fact that the Monad type class does not require
a Funct...
converting double to integer in java
..., the result is equal to the value of the expression:
(long)Math.floor(a + 0.5d)
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