From: Brian Candler <b.candler@...>
Date: 2009-12-27T04:33:36+09:00
Subject: Re: newbie: if is not null else...

If you're using Rails (or more specifically the ActiveSupport library), 
then you can do

  x = '-' if x.blank?

I thought it was worth mentioning in case the OP is moving from PHP to 
Rails.

BTW you almost certainly won't want $x (a global variable) in Ruby.
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