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How to delete an element from an array in C#
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342
If you want to remove all instances of 4 without needing to know the index:
LINQ: (.NET Frame...
Sample random rows in dataframe
...rnorm(20), nrow=10))
> df
X1 X2
1 0.7091409 -1.4061361
2 -1.1334614 -0.1973846
3 2.3343391 -0.4385071
4 -0.9040278 -0.6593677
5 0.4180331 -1.2592415
6 0.7572246 -0.5463655
7 -0.8996483 0.4231117
8 -1.0356774 -0.1640883
9 -0.3983045 0.7157506
10 -0.9060305 2.3234...
`elif` in list comprehension conditionals
...s were designed exactly for this sort of use-case:
>>> l = [1, 2, 3, 4, 5]
>>> ['yes' if v == 1 else 'no' if v == 2 else 'idle' for v in l]
['yes', 'no', 'idle', 'idle', 'idle']
Hope this helps :-)
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Use find command but exclude files in two directories
...th ./scripts/
Testing the Solution:
$ mkdir a b c d e
$ touch a/1 b/2 c/3 d/4 e/5 e/a e/b
$ find . -type f ! -path "./a/*" ! -path "./b/*"
./d/4
./c/3
./e/a
./e/b
./e/5
You were pretty close, the -name option only considers the basename, where as -path considers the entire path =)
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How to iterate for loop in reverse order in swift?
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233
Xcode 6 beta 4 added two functions to iterate on ranges with a step other than one:
stride(from...
validation custom message for rails 3
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edited Mar 4 '15 at 3:20
Andrew Hendrie
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an...
How do I remove leading whitespace in Python?
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324
The lstrip() method will remove leading whitespaces, newline and tab characters on a string be...
Grouping functions (tapply, by, aggregate) and the *apply family
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1344
+100
R has ...
How to append multiple values to a list in Python
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384
You can use the sequence method list.extend to extend the list by multiple values from any kin...
Append a NumPy array to a NumPy array
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234
In [1]: import numpy as np
In [2]: a = np.array([[1, 2, 3], [4, 5, 6]])
In [3]: b = np.array(...