Compare keys in yaml files

compare_yaml_hash.rb

def compare_yaml_hash(cf1, cf2, context = [])
  case
  when cf1.is_a?(Hash)
    cf1.each do |key, value|
  
      unless cf2.key?(key)
        puts "Missing key : #{key} in path #{context.join(".")}" 
        next
      end
  
      value2 = cf2[key]
      if (value.class != value2.class)
        puts "Key value type mismatch : #{key} in path #{context.join(".")}" 
        next
      end
  
      if value.is_a?(Hash)
        compare_yaml_hash(value, cf2[key], (context << key))  
        next
      end  
    end

  when cf1.is_a?(Array)
    cf1.each do |key|
      if key.is_a?(Hash)
        compare_yaml_hash(key, cf2[key], (context << key))  
        next
      end
    end
  end
end

require 'yaml'
aa = YAML.load_file("a.yml")

bb = YAML.load_file("b.yml")

compare_yaml_hash(aa,bb)
compare_yaml_hash(bb,aa)

Reference from： http://stackoverflow.com/questions/6274126/how-to-compare-keys-in-yaml-files

You need to pop the last element in context coming out of the subcycle of compare_yaml_hash

compare_yaml_hash(key, cf2[key], (context << key))  
context.pop
next

That would do the trick.