From: Joshua Muheim <forum@...>
Date: 2008-08-13T01:03:55+09:00
Subject: What's the easiest way to check if param[:x][:y] exists?

Hi all

In PHP I can simply check whether $param['x']['y'] exists regardless
whether $param['x'] exists or not.
In Rails I get a NoMethodError when using

if param[:x][:y]
  ..
end

when param[:x] is nil. So I always have to use

if param[:x] and param[:x][:y]
  ..
end

but I think that's not very beautiful - think about a case where I have
to check whether param[:a][:b][:c][:d][:...] exists or not!

Maybe there's a cooler way to do this? ;-)

Thanks
Josh
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