End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Set#flatten!

flatten!

# File tmp/rubies/ruby-3.0.5/lib/set.rb, line 236
def flatten!
  replace(flatten()) if any? { |e| e.is_a?(Set) }
end

Equivalent to Set#flatten, but replaces the receiver with the result in place. Returns nil if no modifications were made.

See also #flatten #include? #filter! #initialize_clone also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1