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Re: Help with regexp
From: |
harven |
Subject: |
Re: Help with regexp |
Date: |
Wed, 02 Dec 2009 10:41:53 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) |
Andreas Politz <politza@fh-trier.de> writes:
> Things I (won't) miss most:
>
> - extreme backslasheritis
> - no short aliases for important constructs :
> digits,symbol-constituents,newline,space
??
\sw word constituent. Same as \w.
\s_ symbol constituent.
\s- whitespace character. Same as [[:space:]]
See the wiki for the full list
http://www.emacswiki.org/emacs-en/RegularExpression
In a string you can use \n to match a newline, \t to match a tab.
That's the reason why you have to use \\ to match a backslash.
You can of course define your own classes using the category mechanism.
And there is a user-friendly syntax with the rx command.
Finally, if you miss perl, just use it. The following command
will search, replace with the perl engine.
(defun my-perl (prefix start end code)
"ask for a perl expression in the minibuffer. Execute with the region as input.
By default, the result is put in a separate buffer.
If an argument is given, replace the region with the output.
The perl command is executed with the -ln switches."
(interactive "P\nr\nsPerl : ")
(shell-command-on-region start end
(concat "perl -lne '" code "'")
(if prefix '(nil t))))
Examples
List lines in the region that contain the string "string"
M-x my-perl RET print if /string/ RET
Replace in the region all e by E
C-u M-x my-perl RET s/e/E/g;print RET
Count the number of lines in the region
M-x my-perl RET print $. if eof RET
- Help with regexp, Xavier Maillard, 2009/12/01
- Message not available
- Re: Help with regexp,
harven <=
- Re: Help with regexp, Andreas Politz, 2009/12/02
- Re: Help with regexp, Lennart Borgman, 2009/12/02
- Re: Help with regexp, Andreas Politz, 2009/12/02
- Re: Help with regexp, Lennart Borgman, 2009/12/02
- Message not available
- Re: Help with regexp, harven, 2009/12/02
- Re: Help with regexp, Andreas Politz, 2009/12/02
- Message not available
- Re: Help with regexp, Pascal J. Bourguignon, 2009/12/02
Re: Help with regexp, Xavier Maillard, 2009/12/02
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