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Selecting pandas column by location
...e to mind:
>>> df
A B C D
0 0.424634 1.716633 0.282734 2.086944
1 -1.325816 2.056277 2.583704 -0.776403
2 1.457809 -0.407279 -1.560583 -1.316246
3 -0.757134 -1.321025 1.325853 -2.513373
4 1.366180 -1.265185 -2.184617 0.881514
>>> df.iloc...
Correct way to populate an Array with a Range in Ruby
...te an array with a range using splat,
>> a=*(1..10)
=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
using Kernel Array method,
Array (1..10)
=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
or using to_a
(1..10).to_a
=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
...
Shuffle two list at once with same order
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answered Apr 25 '14 at 9:45
sshashank124sshashank124
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...
How to convert a boolean array to an int array
...[ True, False, True], dtype=bool)
>>> x + [1, 2, 3]
array([2, 2, 4])
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Clojure: cons (seq) vs. conj (list)
...ts to insert into a collection, while cons takes just one:
(conj '(1 2 3) 4 5 6)
; => (6 5 4 1 2 3)
(cons 4 5 6 '(1 2 3))
; => IllegalArgumentException due to wrong arity
Another difference is in the class of the return value:
(class (conj '(1 2 3) 4))
; => clojure.lang.PersistentList
...
Checking for the correct number of arguments
...
– Laurence Gonsalves
Dec 3 '10 at 1:24
I figured it out thank you. How about if the file name doesnt exist?
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How to get subarray from array?
I have var ar = [1, 2, 3, 4, 5] and want some function getSubarray(array, fromIndex, toIndex) , that result of call getSubarray(ar, 1, 3) is new array [2, 3, 4] .
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How do you downgrade rubygems?
...
Ryan BiggRyan Bigg
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What does the “|” (single pipe) do in JavaScript?
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