Regular Expressions: Difference between revisions
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A regular expressions is a standard way of using text to form a search to match patterns. | |||
Similar to using an asterisk like this: <code>*.jpg</code> in a search box to find all JPEG files, you can use a regular expression (along with something like [[grep]]) to match much more complex patterns. | |||
For example, you could use: | |||
<code> \b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b </code> | |||
to search for any e-mail addresses in a file | |||
== Cheat Sheet == | |||
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<ol> | <ol> | ||
<li>[http://ryanstutorials.net/linuxtutorial/grep.php Ryan's Tutorials Grep and Regular Expressions]</li> | <li>[http://ryanstutorials.net/linuxtutorial/grep.php Ryan's Tutorials Grep and Regular Expressions]</li> | ||
<li>[http://www.regular-expressions.info/ Regular Expressions Info]</li> | |||
</ol> | </ol> | ||
Revision as of 02:42, 23 December 2016
A regular expressions is a standard way of using text to form a search to match patterns.
Similar to using an asterisk like this: *.jpg in a search box to find all JPEG files, you can use a regular expression (along with something like grep) to match much more complex patterns.
For example, you could use:
\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b
to search for any e-mail addresses in a file