Difference between revisions of "IDE regular expressions"
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=== Point . === | === Point . === | ||
− | Matches any character. Example: 'a.c' matches 'abc', 'aBC', 'axc', 'a3c', 'a$c', etc. | + | Matches any one character. Example: 'a.c' matches 'abc', 'aBC', 'axc', 'a3c', 'a$c', etc. |
=== Round brackets ( ) === | === Round brackets ( ) === |
Revision as of 21:39, 1 May 2006
Normal regular expression
They are pretty similar to Perl regular expression syntax.
Point .
Matches any one character. Example: 'a.c' matches 'abc', 'aBC', 'axc', 'a3c', 'a$c', etc.
Round brackets ( )
Useful to bound expressions. For example: (abc)+ matches 'abc' or 'abcabc' or 'abcabcabc' etc.
Simple Syntax
Some IDE dialogs provide a checkbox to enable 'simple syntax'. These regular expressions are shorter for common file name filters.
Technically it does this:
The following characters are replaced with . -> \. * -> .* ? -> . , -> | ; -> | Finally enclose by ^( )$
Search and Replace with regular expressions
The find dialogs support regular expressions for finding and replacing. For example:
- Find expression: a(.*)c
- Replace expression: A$1C
- Text: 'abc aLazc'
The $1 will be replaced with the found text, that matches the first bracket.
- Result: 'AbC ALazC'