大约有 47,000 项符合查询结果（耗时：0.0500秒） [XML]
Pandas aggregate count distinct
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How about either of:
>>> df
date duration user_id
0 2013-04-01 30 0001
1 2013-04-01 15 0001
2 2013-04-01 20 0002
3 2013-04-02 15 0002
4 2013-04-02 30 0002
>>> df.groupby("date").agg({"duration": np.sum, "user_id": ...
Generic deep diff between two objects
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20 Answers
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Does java.util.List.isEmpty() check if the list itself is null? [duplicate]
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answered Jul 16 '12 at 20:34
LionLion
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What is the best way to programmatically detect porn images? [closed]
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This was written in 2000, not sure if the state of the art in porn detection has advanced at all, but I doubt it.
http://www.dansdata.com/pornsweeper.htm
PORNsweeper seems to have some ability to distinguish pictures of people from pictures of ...
TextView Marquee not working [duplicate]
...ng now :)
Code attached below
<TextView
android:text="START | lunch 20.00 | Dinner 60.00 | Travel 60.00 | Doctor 5000.00 | lunch 20.00 | Dinner 60.00 | Travel 60.00 | Doctor 5000.00 | END"
android:id="@+id/MarqueeText"
android:layout_width="fill_parent"
android:layout_height="wra...
Should I use px or rem value units in my CSS? [closed]
... 1 CSS pixel equals 2 physical Retina display pixels.
That said, up until 2010 (and the mobile zoom situation notwithstanding), the px almost always did equal one physical pixel, because all widely available displays were around 96dpi.
Sizes specified in ems are relative to the parent element. Thi...
Watch multiple $scope attributes
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– Alejandro García Iglesias
Apr 3 '17 at 20:36
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How to test a merge without actually merging first
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answered Sep 20 '11 at 11:16
Mark LongairMark Longair
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How to find if an array contains a specific string in JavaScript/jQuery? [duplicate]
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answered May 24 '11 at 20:34
lonesomedaylonesomeday
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ListView addHeaderView causes position to increase by one?
...r adapter solution does.
– Dori
Aug 20 '13 at 9:04
3
also you have to cast the item in this case....