How do I compare two hashes?

Question

I am trying to compare two Ruby Hashes using the following code:

#!/usr/bin/env ruby

require \"yaml\"
require \"active_support\"

file1 = YAML::load(File.op         


        

Answer 1

If you need a quick and dirty diff between hashes which correctly supports nil in values you can use something like

def diff(one, other)
  (one.keys + other.keys).uniq.inject({}) do |memo, key|
    unless one.key?(key) && other.key?(key) && one[key] == other[key]
      memo[key] = [one.key?(key) ? one[key] : :_no_key, other.key?(key) ? other[key] : :_no_key]
    end
    memo
  end
end