Set#subtract

(::_Each[A]) -> self

subtract(enum)

# File tmp/rubies/ruby-3.4.1/lib/set.rb, line 612
def subtract(enum)
  do_with_enum(enum) { |o| delete(o) }
  self
end

Deletes every element that appears in the given enumerable object and returns self.

See also #subset? #superset? #size #to_a also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0