Documentation for infix (|), infix ∪ assembled from the following types:

language documentation Sets, bags, and mixes

From Sets, bags, and mixes

(Sets, bags, and mixes) infix (|), infix ∪

Returns the union of all its arguments. More information, Wikipedia definition.

language documentation Operators

From Operators

(Operators) infix (|), infix ∪

multi sub infix:<(|)>(**@p)
multi sub infix:<∪>(**@p)

Union operator.

Returns the union of all of its arguments. This creates a new Set that contains all the elements its arguments contain if none of the arguments are a Bag, BagHash, Mix or MixHash.

say <a b d> ∪ bag(<a a b c>); # OUTPUT: «Bag(a(2), b, c, d)␤» 

If any of the arguments are Baggy or Mixy>, the result is a new Bag (or Mix) containing all the elements, each weighted by the highest weight that appeared for that element.

say <a b d> ∪ bag(<a a b c>); # OUTPUT: «Bag(a(2), b, c, d)␤» 

∪ is equivalent to (|), at codepoint U+222A (UNION).