2map-as ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... newelt ) exemplar -- ... newseq )
Factor handbook » The language » Collections » Sequence operations » Sequence combinators » Pair-wise sequence combinators

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Vocabulary
sequences

Inputs

seq1	a sequence
seq2	a sequence
quot	a quotation with stack effect ( ... elt1 elt2 -- ... newelt )
exemplar	a sequence

Outputs

newseq

a new sequence

Word description
Applies the quotation to each pair of elements in turn, yielding new elements which are collected into a new sequence having the same class as exemplar.

Definition

USING: kernel sequences.private ;

IN: sequences

: 2map-as
    ( ... seq1 seq2 quot: ( ... elt1 elt2 -- ... newelt ) exemplar -- ... newseq )
    [ 2length-operator ] dip map-integers-as ; inline