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warning: implicit declaration of function
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edited Dec 9 '11 at 3:53
answered Dec 9 '11 at 3:50
cni...
inserting characters at the start and end of a string
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Mark ByersMark Byers
683k155155 gold badges14681468 silver badges13881388 bronze badges
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Get column index from column name in python pandas
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Sure, you can use .get_loc():
In [45]: df = DataFrame({"pear": [1,2,3], "apple": [2,3,4], "orange": [3,4,5]})
In [46]: df.columns
Out[46]: Index([apple, orange, pear], dtype=object)
In [47]: df.columns.get_loc("pear")
Out[47]: 2
although to be honest I don...
How to calculate a mod b in Python?
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answered Jun 13 '09 at 16:59
eduffyeduffy
34.1k99 gold badges9090 silver badges8989 bronze badges
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Convert number strings with commas in pandas DataFrame to float
...ap(atof)
Out[12]:
0 1
0 1200 4200.00
1 7000 -0.03
2 5 0.00
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Finding the index of elements based on a condition using python list comprehension
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Flatten an Array of Arrays in Swift
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Swift >= 3.0
reduce:
let numbers = [[1,2,3],[4],[5,6,7,8,9]]
let reduced = numbers.reduce([], +)
flatMap:
let numbers = [[1,2,3],[4],[5,6,7,8,9]]
let flattened = numbers.flatMap { $0 }
joined:
let numbers = [[1,2,3],[4],[5,6,7,8,9]]
let joined = Array(numbers.joined()...
Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)
...uest 0 elements, you get the empty end of the array. But there is no index 5, so you can't slice from there.
When you do index (like array[4]), you are pointing at elements themselves, so the indices only go from 0 to 3.
sh...
Sass - Converting Hex to RGBa for background opacity
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Create list of single item repeated N times
...eit('itertools.repeat(0, 10)', 'import itertools', number = 1000000)
0.37095273281943264
>>> timeit.timeit('[0] * 10', 'import itertools', number = 1000000)
0.5577236771712819
But wait - it's not a fair test...
>>> itertools.repeat(0, 10)
repeat(0, 10) # Not a list!!!
The fun...