method

&

Ruby latest stable (v2_5_5) - 0 notes - Class: Set

&(enum) public

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

Set[1, 3, 5] & Set[3, 2, 1]             #=> #<Set: {3, 1}>
Set['a', 'b', 'z'] & ['a', 'b', 'c']    #=> #<Set: {"a", "b"}>

Show source

# File lib/set.rb, line 472
  def &(enum)
    n = self.class.new
    do_with_enum(enum) { |o| n.add(o) if include?(o) }
    n
  end