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

instance method

Set#union

union(enum)

# File tmp/rubies/ruby-3.2.0/lib/set.rb, line 627
def |(enum)
  dup.merge(enum)
end

Alias of #|

Returns a new set built by merging the set and the elements of the given enumerable object.

Example

Set[1, 2, 3] | Set[2, 4, 5]         #=> #<Set: {1, 2, 3, 4, 5}>
Set[1, 5, 'z'] | (1..6)             #=> #<Set: {1, 5, "z", 2, 3, 4, 6}>

See also #| #to_set #to_s also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0