ClusterLabs/hawk

# Copyright (c) 2009-2015 Tim Serong <tserong@suse.com>
# See COPYING for license.

class Hash
  def diff(other)
    (self.keys + other.keys).uniq.inject({}) do |memo, key|
      unless self[key] == other[key]
        if self[key].kind_of?(Hash) && other[key].kind_of?(Hash)
          memo[key] = self[key].diff(other[key])
        else
          memo[key] = [self[key], other[key]]
        end
      end

      memo
    end
  end
end