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JavaScript equivalent to printf/String.Format
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edited Jan 31 '19 at 19:07
community wiki
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What is a non-capturing group in regular expressions?
...ow.com/"
Group 1: "http"
Group 2: "stackoverflow.com"
Group 3: "/"
Match "https://stackoverflow.com/questions/tagged/regex"
Group 1: "https"
Group 2: "stackoverflow.com"
Group 3: "/questions/tagged/regex"
But I don't care about the protocol -- I just want the host an...
Why is the Windows cmd.exe limited to 80 characters wide?
I love stretching my terminal on unix. What is the history or reason behind windows lame command line?
14 Answers
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Group By Multiple Columns
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1237
Use an anonymous type.
Eg
group x by new { x.Column1, x.Column2 }
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An efficient way to transpose a file in Bash
...,j];
}
print str
}
}' file
output
$ more file
0 1 2
3 4 5
6 7 8
9 10 11
$ ./shell.sh
0 3 6 9
1 4 7 10
2 5 8 11
Performance against Perl solution by Jonathan on a 10000 lines file
$ head -5 file
1 0 1 2
2 3 4 5
3 6 7 8
4 9 10 11
1 0 1 2
$ wc -l < file
10000
$ time per...
java.lang.NoClassDefFoundError: Could not initialize class XXX
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buræquete
12.5k44 gold badges3131 silver badges6262 bronze badges
answered Sep 6 '11 at 20:35
John VintJohn Vint
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Compare two MySQL databases [closed]
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ydaetskcoR
34.9k66 gold badges9494 silver badges114114 bronze badges
answered Jan 3 '12 at 21:03
JaredJared
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How do I install the OpenSSL libraries on Ubuntu?
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answered Jun 10 '10 at 17:43
Niki YoshiuchiNiki Yoshiuchi
14.2k11 gold badge3030 silver badges4040 bronze badges
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How to disable a particular checkstyle rule for a particular line of code?
...gured in my project, that prohibits to define class methods with more than 3 input parameters. The rule works fine for my classes, but sometimes I have to extend third-party classes, which do not obey this particular rule.
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Remap values in pandas column with a dict
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373
You can use .replace. For example:
>>> df = pd.DataFrame({'col2': {0: 'a', 1: 2, 2:...