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+ | The next example shows use of <tt>\|</tt> ("or") to delete all lines ''except'' those that contain "<tt>error</tt>" or "<tt>warn</tt>" or "<tt>fail</tt>" ({{help|pattern}}): |
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− | If you want to match multiple patterns, use \| (for or) or \& (for and): |
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− | :v/error |
+ | :v/error\|warn\|fail/d |
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Revision as of 06:12, 7 October 2009
created February 10, 2002 · complexity basic · author tarjei · version 5.7
The ex command g is very useful for acting on lines that match a pattern. You can use it with the d command, to delete all lines that contain a particular pattern, or all lines that do not contain a pattern.
For example, to delete all lines containing "profile" (the first command is optional; it shows the lines that the second command will delete):
:g/profile :g/profile/d
More complex patterns can be used, such as deleting all lines that are empty or that contain only whitespace:
:g/^\s*$/d
To delete all lines that do not contain a pattern, use g!, like this command to delete all lines that are not comment lines in a Vim script:
:g!/^\s*"/d
Note that g! is equivalent to v, so you could also do the above with:
:v/^\s*"/d
The next example shows use of \| ("or") to delete all lines except those that contain "error" or "warn" or "fail" (:help pattern):
:v/error\|warn\|fail/d