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Interactive search/replace regex in Vim?
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edited Feb 3 '19 at 23:15
Laurel
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What can I use for good quality code coverage for C#/.NET? [closed]
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edited Jun 14 '19 at 20:35
community wiki
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With bash, how can I pipe standard error into another process?
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mmlb
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answered Mar 27 '12 at 11:28
ScotScot
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What are the aspect ratios for all Android phone and tablet devices?
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║ 5 x 3 ║ 0.6 ║ 1.667... ║
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How can I represent an 'Enum' in Python?
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43 Answers
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Bootstrap 3 Navbar Collapse
Is there any way to increase the point at which the bootstrap 3 navbar collapses (i.e. so that it collapses into a drop down on portrait tablets)?
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What does the caret operator (^) in Python do?
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>>> 0^1
1
To explain one of your own examples:
>>> 8^3
11
Think about it this way:
1000 # 8 (binary)
0011 # 3 (binary)
---- # APPLY XOR ('vertically')
1011 # result = 11 (binary)
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Homebrew install specific version of formula?
...a, it puts it in a versioned directory like /usr/local/Cellar/postgresql/9.3.1. Only symbolic links to this folder are then installed globally. In principle, this makes it pretty easy to switch between two installed versions. (*)
If you have been using homebrew for longer and never removed older ve...
Automatically expanding an R factor into a collection of 1/0 indicator variables for every factor le
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131
Use the model.matrix function:
model.matrix( ~ Species - 1, data=iris )
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Remove rows with all or some NAs (missing values) in data.frame
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2 ENSG00000199674 0 2 2 2 2
6 ENSG00000221312 0 1 2 3 2
na.omit is nicer for just removing all NA's. complete.cases allows partial selection by including only certain columns of the dataframe:
> final[complete.cases(final[ , 5:6]),]
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