Documentation for infix X assembled from the following pages:
Language documentation: Operators §
From Operators
(Operators) infix X §
Defined as:
multi sub infix:<X>(+lol, :! --> Seq)multi sub infix:<X>(+lol --> Seq)Creates a cross product from all the lists, ordered so that the rightmost elements vary most rapidly, and returns a Seq:
1..3 X <a b c> X 9# produces ((1 a 9) (1 b 9) (1 c 9) # (2 a 9) (2 b 9) (2 c 9) # (3 a 9) (3 b 9) (3 c 9))The X operator also exists as a metaoperator, in which case the inner lists are replaced by the value from applying the operator to the list:
1..3 X~ <a b c> X~ 9# produces (1a9 1b9 1c9 2a9 2b9 2c9 3a9 3b9 3c9)