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Add column with constant value to pandas dataframe [duplicate]
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The reason this puts NaN into a column is because df.index and the Index of your right-hand-side...
Pandas get topmost n records within each group
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195
Did you try df.groupby('id').head(2)
Ouput generated:
>>> df.groupby('id').head(2)...
How to replace a character with a newline in Emacs?
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edited Apr 9 '14 at 9:48
itsjeyd
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ans...
how to find host name from IP with out login to the host
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11 Answers
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JSON.parse unexpected character error
...e not parsing a string, you're parsing an already-parsed object :)
var obj1 = JSON.parse('{"creditBalance":0,...,"starStatus":false}');
// ^ ^
// if you want to parse, the input should be a string
var obj2 = {"creditBa...
How to find all combinations of coins when given some dollar value
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Check if value is in select list with JQuery
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180
Use the Attribute Equals Selector
var thevalue = 'foo';
var exists = 0 != $('#select-box opti...
GetType() can lie?
... code from the MSDN for the GetType() method) you could indeed have:
int n1 = 12;
BadFoo foo = new BadFoo();
Console.WriteLine("n1 and n2 are the same type: {0}",
Object.ReferenceEquals(n1.GetType(), foo.GetType()));
// output:
// n1 and n2 are the same type: True
so, yikes, ...
MySql - Way to update portion of a string?
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edited Nov 27 '18 at 15:05
Madara's Ghost
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PHP code to remove everything but numbers
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281
Try this:
preg_replace('/[^0-9]/', '', '604-619-5135');
preg_replace uses PCREs which general...