End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Set#reject!

reject!(&block)

# File tmp/rubies/ruby-3.2.0/lib/set.rb, line 584
def reject!(&block)
  block or return enum_for(__method__) { size }
  n = size
  delete_if(&block)
  self if size != n
end

Equivalent to Set#delete_if, but returns nil if no changes were made. Returns an enumerator if no block is given.

See also #proper_superset? #replace #proper_subset? #reset also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0

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