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

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Ruby » Hash » 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}   Related examples in the same category 1.  Add method hash class to invert a hash: turn value to key 2.  Grep a hash 3.  Find all

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