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How to filter rows in pandas by regex
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Use contains instead:
In [10]: df.b.str.contains('^f')
Out[10]:
0 False
1 True
2 True
3 False
Name: b, dtype: bool
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In Java, is there a way to write a string literal without having to escape quotes?
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answered Jun 13 '10 at 22:48
JackJack
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C++ Returning reference to local variable
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edited Jan 10 '11 at 5:06
answered Jan 10 '11 at 4:38
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Populating a database in a Laravel migration file
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BenjaminRHBenjaminRH
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Finding three elements in an array whose sum is closest to a given number
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answered Jan 15 '10 at 9:23
John FeminellaJohn Feminella
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What is a software framework? [closed]
...ions 5m by 5m, then surely you would do that. But suppose I ask you to cut 1000 pieces of paper of the same dimensions. In this case, you won't do the measuring 1000 times; obviously, you would make a frame of 5m by 5m, and then with the help of it you would be able to cut 1000 pieces of paper in le...
Check that an email address is valid on iOS [duplicate]
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{
BOOL stricterFilter = NO; // Discussion http://blog.logichigh.com/2010/09/02/validating-an-e-mail-address/
NSString *stricterFilterString = @"^[A-Z0-9a-z\\._%+-]+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}$";
NSString *laxString = @"^.+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2}[A-Za-z]*$";
NSString *emai...
How to find all occurrences of a substring?
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[m.start() for m in re.finditer('test', 'test test test test')]
#[0, 5, 10, 15]
If you want to find overlapping matches, lookahead will do that:
[m.start() for m in re.finditer('(?=tt)', 'ttt')]
#[0, 1]
If you want a reverse find-all without overlaps, you can combine positive and negative lo...
How can I change CSS display none or block property using jQuery?
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answered Aug 27 '10 at 8:53
djdd87djdd87
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How to convert an integer to a string in any base?
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answered Feb 15 '10 at 16:44
Alex MartelliAlex Martelli
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