From: Abder-rahman Ali <abder.rahman.ali@...>
Date: 2010-06-15T00:24:08+09:00
Subject: Regular expressions in Ruby

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?

Thanks.
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