From: "David A. Black" <dblack@...>
Date: 2008-09-01T19:28:11+09:00
Subject: Re: Looking for a regular pattern

Hi --

On Mon, 1 Sep 2008, Patrick He wrote:

> Additionally, you can use pattern "(.|\n)" if you want to match all
> characters including "\n" in single line mode.

Ruby regexes don't really have a single vs. multiple line mode
distinction. They always act as if they have the Perl /m modifier in
place, so that ^ and $ match beginning and end of line but never
beginning and end of string. So Ruby's default mode is like Perl's
multi-line mode. Ruby doesn't really have a single-line mode. /m just
adds \n to the . class, so it's sort of single line, but ^ and $ still
match lines and not the whole string.


David

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