Find various forms of a word
fast(er|est)
this reg. expression th(is|e|at) will find the words This, The, and That

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Find a specific tag 
Here is a useful regular expression for dealing with XML or HTML files - it matches an opening, closing or singular blink tag. Simply replace blink with your tag of choice. 

<(/?)(blink)( [^>]*)?(/?)>

Matches: 

<blink>
<blink align="center">
</blink>
<blink garbage="true"/>

Does not match: 

<blinking>

To use it in a search and replace (for instance, replace all blink tags with spans) use the following as the replace string: 

<\1span\3\4>

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(.*) Means a string of any characters zero or more in length.

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Remove all leading spaces and tabs from every line
Find: "^[ |\t]+" (without quotes)
Replace: "" (without quotes)
RegExp


[edit]Remove all trailing spaces and tabs from every line
Find: "[ |\t]+$" (without quotes)
Replace: "" (without quotes)
RegExp


[edit]Delete everything inside a tag pair (keeping tags)
Find: "(<delete>).+(</delete>)" (without quotes)
Replace: "\1\2" (without quotes)
RegExp
Note: Tags must be on the same line. 

[edit]Delete everything inside a tag pair (removing tags too)
Find: "<delete>.+</delete>" (without quotes)
Replace: "" (without quotes)
RegExp
Note: Tags must be on the same line. 

[edit]Truncate last value from a MySQL INSERT query
Find: "(VALUES \('...', '.+'), .+\);" (without quotes)
Replace: "\1);" (without quotes)
RegExp


[edit]Keep only last value in a MySQL INSERT query
Find: "(VALUES \(.+,)(.+\);)" (without quotes)
Replace: "VALUES (\2" (without quotes)
RegExp

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