From: Mark Hubbart <discord@...>
Date: 2004-04-25T04:48:36+09:00
Subject: Re: gsub oddity?


On Apr 24, 2004, at 10:10 AM, Michael Neumann wrote:

> Hi,
>
>   "\000".gsub("\000") { "\\000" }
>   # => "\\000"
>
>   "\000".gsub("\000", "\\000")
>   # => "\00000"
>
> I expected both to return the same result.
> Just tell me it's not a bug and I'm happy :-)

Not a bug :)

When used in an argument rather than in a block, \0 inserts the matched 
string. So gsub("\000", "\\000") is really saying "replace any null 
characters with themselves followed by two zeros".

The block form does not interpolate backslashed matches.

cheers,
--Mark