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When to use a “has_many :through” relation in Rails?
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edited Dec 1 '15 at 10:07
Arslan Ali
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How is set() implemented?
... Justin EthierJustin Ethier
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Hadoop “Unable to load native-hadoop library for your platform” warning
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answered Nov 15 '13 at 4:12
zhutoulalazhutoulala
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Why does intellisense and code suggestion stop working when Visual Studio is open?
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edited Sep 16 '15 at 16:26
SharpC
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How do write IF ELSE statement in a MySQL query
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150
You probably want to use a CASE expression.
They look like this:
SELECT col1, col2, (case wh...
Copy folder structure (without files) from one location to another
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15 Answers
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Submitting a multidimensional array via POST with php
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answered Mar 12 '10 at 15:44
DisgruntledGoatDisgruntledGoat
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Sample random rows in dataframe
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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 2.3234110
Then select some rows at random:
> df[sample(nrow(df), 3), ]
X1 X2
9 -0...
Automatic prune with Git fetch or pull
...o make that happen?
– Andrew
Jun 1 '15 at 20:36
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@Andrew a good start would be git config --glo...
How to redirect stderr and stdout to different files in the same line in script?
...be in order)
– ThorSummoner
Jan 19 '15 at 5:19
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