From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2010-06-15T00:34:09+09:00
Subject: Re: Regular expressions in Ruby

On Mon, Jun 14, 2010 at 5:24 PM, Abder-rahman Ali
<abder.rahman.ali@gmail.com> wrote:
> I'm new to Ruby, and just want to ask about how to read the following
> statement from the "Agile Web Development With Rails, 3rd edition" book:
>
> %r{\.(gif|jpg|png)$}i
>
> I knew that %r is a way to write a regular expression.
>
> But, what is the $, and the i?

I always have this link handy:

http://www.zenspider.com/Languages/Ruby/QuickRef.html#11

$ matches the end of a line or string
i is a modifier that makes the regexp case insensitive.

Jesus.