大约有 38,308 项符合查询结果（耗时：0.0533秒） [XML]
Numbering rows within groups in a data frame
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284
Use ave, ddply, dplyr or data.table:
df$num <- ave(df$val, df$cat, FUN = seq_along)
or:
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What jsf component can render a div tag?
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Romain LinsolasRomain Linsolas
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How to get jQuery to wait until an effect is finished?
...is "animation done callback" bug was a nasty one: bugs.jquery.com/ticket/5684
– JustAMartin
May 23 '14 at 16:03
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Accessing last x characters of a string in Bash
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edited May 23 '17 at 12:18
Community♦
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answered Nov 8 '13 at 12:03
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Array initializing in Scala
...Vasil Remeniuk
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6
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ConnectionTimeout versus SocketTimeout
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edited Sep 21 '18 at 17:53
answered Sep 9 '11 at 11:24
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Is == in PHP a case-sensitive string comparison?
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edited Feb 28 '17 at 17:46
Player1
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answered Aug 17...
Stubbing a class method with Sinon.js
...with this answer.
– loganfsmyth
Aug 8 '17 at 21:52
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PostgreSQL, checking date relative to “today”
...yAlex Howansky
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10
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count number of lines in terminal output
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João SilvaJoão Silva
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