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
when param[:x] is nil. So I always have to use
if param[:x] and param[:x][:y]
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?