This is an automatically generated page and cannot be edited directly. Text in Composite pages, (URLs starting with 'routine' or 'syntax') can be edited by clicking on the link labeled 'in context', and editing the text there.

Exit this popup by pressing <Escape>, or clicking on X or on the background.

(|), infix ∪
Combined from primary sources listed below.

In Sets, bags, and mixes§

See primary documentation in context for infix (|), infix ∪

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

In Operators§

See primary documentation in context for infix (|), infix ∪ 

multi sub infix:<(|)>(**@p)

Union operator.

'|' as in left hand side arguments 'or' right hand side arguments.

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)␤»