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How to shift a column in Pandas DataFrame
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In [18]: a
Out[18]:
x1 x2
0 0 5
1 1 6
2 2 7
3 3 8
4 4 9
In [19]: a.x2 = a.x2.shift(1)
In [20]: a
Out[20]:
x1 x2
0 0 NaN
1 1 5
2 2 6
3 3 7
4 4 8
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What is ASP.NET Identity's IUserSecurityStampStore interface?
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+50
This is meant to represent the current snapshot of your user's credentials. So if nothing changes, the stamp will stay the same. But...
How do I pipe a subprocess call to a text file?
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answered Jan 31 '11 at 22:04
SkurmedelSkurmedel
18.9k55 gold badges4646 silver badges6464 bronze badges
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Draw on HTML5 Canvas using a mouse
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230
Here is a working sample.
<html>
<script type="text/javascript">
var...
Select a Dictionary with LINQ
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edited Mar 6 '09 at 0:30
answered Mar 6 '09 at 0:23
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How to print binary tree diagram?
...l - level;
int endgeLines = (int) Math.pow(2, (Math.max(floor - 1, 0)));
int firstSpaces = (int) Math.pow(2, (floor)) - 1;
int betweenSpaces = (int) Math.pow(2, (floor + 1)) - 1;
BTreePrinter.printWhitespaces(firstSpaces);
List<Node<T>> newNodes ...
Difference Between Invoke and DynamicInvoke
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208
When you have a delegate instance, you might know the exact type, or you might just know that i...
Replace multiple strings with multiple other strings
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– Michal Moravcik
Nov 21 '14 at 13:02
2
You may want to escape the keys for the regular expressi...
Scala: List[Future] to Future[List] disregarding failed futures
...quence(...) but there's a twist... The list I'm given usually has around 10-20 futures in it, and it's not uncommon for one of those futures to fail (they are making external web service requests). Instead of having to retry all of them in the event that one of them fails, I'd like to be able to ge...
Why does `a == b or c or d` always evaluate to True?
...ame == "Kevin" or name == "Jon" or name == "Inbar"', setup="name='Inbar'")
0.4247764749999945
>>> timeit.timeit('name in {"Kevin", "Jon", "Inbar"}', setup="name='Inbar'")
0.18493307199999265
For those who may want proof that if a == b or c or d or e: ... is indeed parsed like this. The bu...