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add a string prefix to each value in a string column using Pandas
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df['col'] = 'str' + df['col'].astype(str)
Example:
>>> df = pd.DataFrame({'col':['...
Return first match of Ruby regex
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PresidentenPresidenten
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django 1.5 - How to use variables inside static tag
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edited Apr 26 '14 at 20:16
Barney Szabolcs
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廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...将会变得无所适从而产生冲突。
另一种情况假如 tomact2,tomcat3同步tomcat1的目录，当tomcat1挂了之后，负载均衡会把访问分配到tomcat2和3，这个时候tomcat2和3彼此独立。客户分别对这两台机器进行读写于是数据又不同步了。
1.2 ...
How to send only one UDP packet with netcat?
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If you are using bash, you might as well write
echo -n "hello" >/dev/udp/localhost/8000
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IntelliJ 13 - Add Navigate Back/Forward to toolbar?
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answered Dec 6 '13 at 20:00
Software EngineerSoftware Engineer
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Revert a range of commits in git
...Git are you using?
Reverting multiple commits in only supported in Git1.7.2+: see "Rollback to an old commit using revert multiple times." for more details.
The current git revert man page is only for the current Git version (1.7.4+).
As the OP Alex Spurling reports in the comments:
Upgrading t...
Use a LIKE statement on SQL Server XML Datatype
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answered Dec 2 '09 at 13:45
marc_smarc_s
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Why is '+' not understood by Python sets?
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Python sets don't have an implementation for the + operator.
You can use | for set union and &a...
How to change the playing speed of videos in HTML5?
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According to this site, this is supported in the playbackRate and defaultPlaybackRate attribut...