From: David Alan Black <dblack@...>
Date: 2001-11-03T08:07:16+09:00
Subject: [ruby-talk:24226] Re: literal \0 in String#gsub replacement

Hello --

On Sat, 3 Nov 2001, Mark Slagell wrote:

> Okay, I'm stuck on something seemingly trivial here. Is it possible for
> '\0' to be a literal part of the replacement string in gsub? I mean,
> without match data being substituted for it.
>
> Say I want '[foo]' to be replaced with '\003foo', etc.
>
>   "apple [cherry] lemon".gsub(/\[(.+?)\]/,'\003\1'
>
> That substitutes for both the \0 and the \1, producing
>
>   "apple [cherry]03cherry lemon"
>
> as it should of course. How can I make the \0 literal and get:
>
>   "apple \003cherry lemon"

Here's one way:

  irb 23> "apple [cherry] lemon".gsub(/\[(.*?)\]/, "\003\\1")
       ==>"apple \003cherry lemon"


David

-- 
David Alan Black
home: dblack@candle.superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav