大约有 23,000 项符合查询结果（耗时：0.0631秒） [XML]
How do you delete a column by name in data.table?
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@user3969377 if you want to remove a column based on the contents of a character variable you'd simply wrap it in parenthesis. Ie. df[,(afoo):=NULL]
– Dean MacGregor
Jul 9 '15 at 19:26
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Clear file cache to repeat performance testing
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Works perfectly for me under Windows 7 SP1, x64. Great tip!
– cxxl
Oct 22 '12 at 16:26
2
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Script entire database SQL-Server
...y I can get a scripting of all tables, procs, and other objects from a database? I know there's an option to script the database but it only gave me some sort of top level script, certainly not a script to create all tables, procs, udfs, .etc.
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Support for “border-radius” in IE
...t, allowing you to serve different style definitions to different browsers based on their capabilities.
Obviously, these both add more overhead, but with IE9 due to only run on Vista/7 we might be stuck for quite awhile. As of August 2010 Windows XP still accounts for 48% of web client OSes.
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Import regular CSS file in SCSS file?
...NOTE:
It appears this isn't working for everybody. If your interpreter is based on libsass it should be working fine (checkout this). I've tested using @import on node-sass and it's working fine. Unfortunately this works and doesn't work on some ruby instances.
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How do I convert dates in a Pandas data frame to a 'date' data type?
...3-01-02
2 3 2013-01-03
In [32]: df['time'] = df['time'].astype('datetime64[ns]')
In [33]: df
Out[33]:
a time
0 1 2013-01-01 00:00:00
1 2 2013-01-02 00:00:00
2 3 2013-01-03 00:00:00
share
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How to increase IDE memory limit in IntelliJ IDEA on Mac?
...k like:
-Xms128m
-Xmx2048m
-XX:MaxPermSize=350m
-XX:ReservedCodeCacheSize=64m
-XX:+UseCodeCacheFlushing
-XX:+UseCompressedOops
Copying the original file is important, as options are not added, they are replaced.
This way your custom options will be preserved between updates and application files...
Why does JavaScript only work after opening developer tools in IE once?
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This solution does not work on IE 11 on Windows 7 64-bit.
– Vikram
Aug 18 '17 at 8:51
1
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tmux set -g mouse-mode on doesn't work
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64
Just a quick heads-up to anyone else who is losing their mind right now:
https://github.com/tm...
ASP.NET 4.5 has not been registered on the Web server
...nd prompt as Administrator then launched C:\Windows\Microsoft.NET\Framework64\v4.0.30319>aspnet_regiis -i
– Sami-L
Dec 6 '12 at 20:51
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