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Why switch is faster than if
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answered Jul 15 '11 at 10:56
DanielDaniel
25.2k1616 gold badges8484 silver badges128128 bronze badges
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How to sort a dataFrame in python pandas by two or more columns?
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490
As of the 0.17.0 release, the sort method was deprecated in favor of sort_values. sort was comp...
An efficient way to transpose a file in Bash
..." "a[i,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
$ ti...
Accessing items in an collections.OrderedDict by index
...> d.items()
[('foo', 'python'), ('bar', 'spam')]
>>> d.items()[0]
('foo', 'python')
>>> d.items()[1]
('bar', 'spam')
Note for Python 3.X
dict.items would return an iterable dict view object rather than a list. We need to wrap the call onto a list in order to make the indexing...
Best practices/guidance for maintaining assembly version numbers
...context we use TeamCity and Subversion/Git. TeamCity is free for a small (10) number of projects and is a very good build server but there are others, some of which are completely free.
What a version number means
What a version means to one person may mean something different to another, the gene...
Algorithm to detect corners of paper sheet in photo
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John_West
2,06944 gold badges2020 silver badges3737 bronze badges
answered Jul 10 '11 at 22:47
Daniel CrowleyDani...
UIView Hide/Show with animation
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Objective C
[UIView transitionWithView:button
duration:0.4
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
button.hidden = YES;
}
completion:NULL];
Swift
UIView.transitio...
How to count total lines changed by a specific author in a Git repository?
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320
The output of the following command should be reasonably easy to send to script to add up the to...
Draw in Canvas by finger, Android
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+200
Start By going through the Fingerpaint demo in the sdk sample.
Another Sample:
public class MainActivity extends Activity {
D...
How to sleep for five seconds in a batch file/cmd [duplicate]
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