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Regex group capture in R with multiple capture-groups
...It returns a character matrix with one column for each group in the match (and one for the whole match):
> s = c("(sometext :: 0.1231313213)", "(moretext :: 0.111222)")
> str_match(s, "\\((.*?) :: (0\\.[0-9]+)\\)")
[,1] [,2] [,3]
[1,] "(sometext ::...
How can I debug git/git-shell related problems?
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How and where to set this variables?
– Hunsu
Jan 15 '16 at 8:28
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What is the difference between gravity and layout_gravity in Android?
I know we can set the following values to the android:gravity and android:layout_gravity properties:
20 Answers
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.htaccess rewrite to redirect root URL to subdirectory
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You can use a rewrite rule that uses ^$ to represent the root and rewrite that to your /store directory, like this:
RewriteEngine On
RewriteRule ^$ /store [L]
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Standard alternative to GCC's ##__VA_ARGS__ trick?
...preprocessor features; you must use some extension to the language. clang and icc have adopted this GCC extension, but MSVC has not.
Back in 2001 I wrote up the GCC extension for standardization (and the related extension that lets you use a name other than __VA_ARGS__ for the rest-parameter) in ...
What is the strict aliasing rule?
... ability to give aliasing warnings, sometimes giving us a friendly warning and sometimes not.)
To see why this behavior is undefined, we have to think about what the strict aliasing rule buys the compiler. Basically, with this rule, it doesn't have to think about inserting instructions to refresh th...
What does the ^ operator do in Java?
...--- xor
3 = 011
This the truth table for bitwise (JLS 15.22.1) and logical (JLS 15.22.2) xor:
^ | 0 1 ^ | F T
--+----- --+-----
0 | 0 1 F | F T
1 | 1 0 T | T F
More simply, you can also think of xor as "this or that, but not both!".
See also
Wikipedia: exclusive-...
Produce a random number in a range using C#
How do I go about producing random numbers within a range?
7 Answers
7
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NodeJS - Error installing with NPM
... am using Windows 8.1, can anyone tell me what is the problem i am facing, and why is this installation not working. There seems to be a problem with the buffertools dependency, thats far as i can think. Dont know how maybe fix this?
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How do the post increment (i++) and pre increment (++i) operators work in Java?
...=>
i=5 + 7 + 8; (a=8)
The main point is that ++a increments the value and immediately returns it.
a++ also increments the value (in the background) but returns unchanged value of the variable - what looks like it is executed later.
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