You have to be careful with using Array() to transform a non-array into an array. Suppose for example you wanted an array of hashes: >> Array([{:a => "b"}])

You have to be careful with using Array() to transform a non-array into an array. Suppose for example you wanted an array of hashes: >> Array([{:a => "b"}]) => [{:a=>"b"}] >> Array({:a => "b"}) => [[:a, "b"]] It doesn't work as you might expect with a Hash. I'd probably recommend sticking with something like either of these unless you know you aren't going to be getting a Hash: a = [a] unless a.is_a?(Array) # option 1 a = [*a] # option 2