make ( quot exemplar -- seq )
Factor handbook » The language » Collections » Making sequences with variables

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, ( elt -- )

Vocabulary
make

Inputs

quot	a quotation
exemplar	a sequence

Outputs

seq	a new sequence

Word description
Calls the quotation in a new dynamic scope with the building variable bound to a new resizable mutable sequence. The quotation and any words it calls can execute the , and % words to accumulate elements into a sequence (or ,, and %% into an assoc). When the quotation returns, all accumulated elements are collected into an object with the same type as exemplar.

Examples

USING: make prettyprint ; [ 1 , 2 , 3 , ] { } make .
{ 1 2 3 }

USING: make prettyprint ; [ 2 1 ,, 4 3 ,, ] H{ } make .
H{ { 1 2 } { 3 4 } }

Definition

USING: kernel make.private sequences ;

IN: make

: make ( quot exemplar -- seq )
    dup sequence? [ make-sequence ] [ make-assoc ] if ; inline