Method: Set#-

Defined in:
lib/set.rb

#-(enum) ⇒ Object Also known as: difference

Returns a new set built by duplicating the set, removing every element that appears in the given enumerable object.



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# File 'lib/set.rb', line 289

def -(enum)
  enum.is_a?(Enumerable) or raise ArgumentError, "value must be enumerable"
  dup.subtract(enum)
end