大约有 12,100 项符合查询结果（耗时：0.0577秒） [XML]
Remove file extension from a file name string
...rary.
– Morten Bork
Aug 22 '17 at 8:06
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Remove useless zero digits from decimals in PHP
...//COMMENT
– Webinan
Jun 1 '15 at 17:06
1
@ESCOBAR Not really, it's an officially suggested method...
How do I escape a single quote?
...-AttValue)
– Gumbo
Mar 11 '10 at 21:06
4
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Error message 'java.net.SocketException: socket failed: EACCES (Permission denied)'
...swer.
– user370305
Jun 30 '12 at 10:06
1
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Jump to editor shortcut in Intellij IDEA
...e a few workarounds for terminal. See this answer: stackoverflow.com/a/23860667/722929
– Tobber
Feb 13 '15 at 8:18
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show 9 more comments
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How can I find the version of the Fedora I use?
...!
– Joshua Sleeper
Aug 24 '18 at 22:06
add a comment
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LINQ with groupby and count
...03/2011 0 | 2
jim 3 01/04/2011 1 | 3
jean 1 01/05/2011 3 | 1
jill 2 01/06/2011 5 | 2
jeb 0 01/07/2011 3 | 0
jenn 0 01/08/2011 7 | 0
it would result in the following result after the groupby:
(Group 1): [joe 1 01/01/2011 5, jean 1 01/05/2011 3]
(Group 0): [jane 0 01/02/2011 9, jeb 0 01/07/...
How to rotate portrait/landscape Android emulator? [duplicate]
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– Mateus Viccari
May 24 '14 at 17:06
1
@MateusViccari That's a bug in the Android 4.4 emulator ...
How to automatically indent source code?
...be wrong?
– Chucky
Jul 12 '13 at 11:06
Chucky, have you considered removing Visual Studio and doing a clean install? I...
Summarizing multiple columns with dplyr? [duplicate]
...1
#> 2 2 3.03 3.04 2.97 2.87
#> 3 3 2.85 2.95 2.95 3.06
If you want to summarize only certain columns, use summarise_at or summarise_if functions.
Alternatively, the purrrlyr package provides the same functionality:
library(purrrlyr)
df %>% slice_rows("grp") %>% dmap(mea...