From: Gavin Kistner <gavin.kistner@...>
Date: 2006-10-17T02:28:41+09:00
Subject: Re: Pattern based substitution

From: Daniel Mircea
> How does pattern based substitution works ?

See
http://phrogz.net/ProgrammingRuby/tut_stdtypes.html#regularexpressions
particularly the section near the end of that page titled "Pattern-Based
Substitution".

> For example, how does textilize replace all occurrences of 
> *hello world* 
> with <strong>hello world</strong> ?

Here's a simple example (probably not what Textilize uses):
source.gsub( /\*([^*]+)\*/, '<strong>\\1</strong>' )