Method: Set#&

Defined in:
lib/set.rb

#&(enum) ⇒ Object Also known as: intersection

Returns a new set containing elements common to the set and the given enumerable object.



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# File 'lib/set.rb', line 297

def &(enum)
  enum.is_a?(Enumerable) or raise ArgumentError, "value must be enumerable"
  n = self.class.new
  enum.each { |o| n.add(o) if include?(o) }
  n
end