大约有 13,065 项符合查询结果（耗时：0.0300秒） [XML]
Does a dot have to be escaped in a character class (square brackets) of a regular expression?
A dot . in a regular expression matches any single character. In order for regex to match a dot, the dot has to be escaped: \.
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MySQL get the date n days ago as a timestamp
In MySQL, how would I get a timestamp from, say 30 days ago?
3 Answers
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Crontab - Run in directory
I would like to set a job to run daily in the root crontab. But I would like it to execute it from a particular directory so it can find all the files it needs, since the application has a bunch of relative paths.
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How to add lines to end of file on Linux
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The easiest way to redirect the output of the echo by >>
echo 'VNCSERVERS="1:root"' >> /etc/sysconfig/configfile
echo 'VNCSERVERARGS[1]="-geometry 1600x1200"' >> /etc/sysconfig/configfile
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How to copy a local Git branch to a remote repo
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According to git push manual page:
git push origin experimental
Find a ref that matches experimental in the source repository (most likely, it would find refs/heads/experimental), and update the same ref (e.g. refs/heads/experimental) in ori...
Serializing an object to JSON
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You're looking for JSON.stringify().
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What is the difference between isinstance('aaa', basestring) and isinstance('aaa', str)?
... versions prior to 3.0 there are two kinds of strings "plain strings" and "unicode strings". Plain strings (str) cannot represent characters outside of the Latin alphabet (ignoring details of code pages for simplicity). Unicode strings (unicode) can represent characters from any alphabet including s...
Check if a given Type is an Enum
I am writing a JsonConverter for Json.NET which should allow me to convert any enum's to a string value defined by a [Description] attribute.
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How to disable textarea resizing?
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You can use css
disable all
textarea { resize: none; }
only vertical resize
textarea { resize: vertical; }
only horizontal resize
textarea { resize: horizontal; }
disable vertical and horizontal with limit
textar...
How does Rails keep track of which migrations have run for a database?
According to Rails doc: http://guides.rubyonrails.org/migrations.html
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