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Deleting a file in VBA
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answered Sep 16 '08 at 11:03
Mike WoodhouseMike Woodhouse
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Setting Environment Variables for Node to retrieve
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answered Dec 8 '15 at 11:17
ctrlplusbctrlplusb
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Can't subtract offset-naive and offset-aware datetimes
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phillcphillc
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Android Activity as a dialog
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answered Dec 30 '09 at 11:08
d-mand-man
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pandas GroupBy columns with NaN (missing) values
...workaround is to use a placeholder before doing the groupby (e.g. -1):
In [11]: df.fillna(-1)
Out[11]:
a b
0 1 4
1 2 -1
2 3 6
In [12]: df.fillna(-1).groupby('b').sum()
Out[12]:
a
b
-1 2
4 1
6 3
That said, this feels pretty awful hack... perhaps there should be an option...
Type Checking: typeof, GetType, or is?
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answered Jun 11 '09 at 19:15
JimmyJimmy
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IIS Express gives Access Denied error when debugging ASP.NET MVC
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115
If you are using Visual Studio, you can also left-click on the project in Solution Explorer an...
Make anchor link go some pixels above where it's linked to
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Eric OlsonEric Olson
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Twitter Bootstrap 3: how to use media queries?
...x){}
@media(min-width:992px){}
@media(min-width:1200px){}
Update 2019-02-11: BS3 info is still accurate as of version 3.4.0, updated BS4 for new grid, accurate as of 4.3.0.
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Delete files older than 3 months old in a directory using .NET
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11
no, as propertyNames says: LastAccessTime - you should go for property CreationTime if you'd like to!
– Andreas Niede...