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Re: Cross-version regular expression...

From: Greg Wooledge
Subject: Re: Cross-version regular expression...
Date: Wed, 13 Apr 2011 15:28:39 -0400
User-agent: Mutt/

On Wed, Apr 13, 2011 at 11:19:22AM -0700, Ray Van Dolson wrote:
> I'm trying to get regular expression matching working on both bash v3
> as well as v4.

Put the RE in a variable.

> The following works on v4 (under RHEL6), but not under bash 3.00.15
> (under RHEL4):
> [[ "6Server" =~ ([0-9]+)(.*) ]]

Put the RE in a variable.

> This works on 3.00.15, but not under RHEL6's bash (4.1.2):
> [[ "6Server" =~ '([0-9]+)(.*)' ]]

Put the RE in a variable.  Don't quote the right hand side.  If you quote
the right hand side, it becomes == matching instead of =~ matching.

[[ 6Server =~ $re ]]

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