intersect-all ( sets -- set/f )
Factor handbook » The language » Collections » Sets » Operations on sets

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Vocabulary
sets

Inputs

sets	a sequence

Outputs

set/f

a set or f

Word description
Outputs the intersection of all the sets of the sequence sets, or f if sets is empty.

Definition

USING: sequences ;

IN: sets

: intersect-all ( sets -- set/f )
    [ f ] [ [ ] [ intersect ] map-reduce ] if-empty ;