Add method to Hash class to remove one hash from another : Hash Extensions « Hash « Ruby

1. Ruby
2. Hash
3. Hash Extensions

Add method to Hash class to remove one hash from another

class Hash
  def remove_hash(other_hash)
    delete_if { |k,v| other_hash[k] == v }
  end
end

squares = { 1 => 1, 2 => 4, 3 => 9 }
doubles = { 1 => 2, 2 => 4, 3 => 6 }
squares.remove_hash(doubles)
squares                                   # => {1=>1, 3=>9}

 

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