OLW: Testing Hash Equality

Another #rubyoneliner this week. We use this to test hash equality for cases where we don’t care about the order of elements in an array for either keys or values.

class Hash
def hash_rep
sort.map{|k,v| Hash[(k.is_? Array ? k.sort : (k.is_a? Hash ? k.hash_rep : k)) => v.is_a? Array ? v.sort : (v.is_a? Hash ? v.hash_rep : v)]}

We have opened up the Hash class to create a method that sorts the arrays at any level in a potentially deeply nested hash. You can use it to test hash equality by comparing the representations generated as follows:
h1.hash_rep == h2.hash_rep

“I never wanted to believe that my Dad was stealing from his job as a road worker. But when I got home, all the signs were there.”


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