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Substitution question

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From: bkhl@xxxxxxxxxxxxxxx (Björn Lindström)
To: zsh-users@xxxxxxxxxx
Subject: Substitution question
Date: Tue, 20 Jul 2004 03:14:58 +0200
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Can somebody tell me what type of patterns are supported in l, in the
$x:s/l/r syntax?

I'd like to do something like:

$x:gs/[^A-Za-z0-9]/_

to replace all characters except for the ones listed with underscore.

Follow-Ups:
- Re: Substitution question
  - From: DervishD

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