gather ( ... seq quot: ( ... elt -- ... elts ) -- ... newseq )

Vocabulary

sets

Inputs

seq	a sequence
quot	a quotation with stack effect ( ... elt -- ... elts )

Outputs

newseq

a sequence

Word description

Maps a quotation over a sequence, concatenates the results of the mapping, and removes duplicates.

Definition

USING: sequences ;

IN: sets

: gather
    ( ... seq quot: ( ... elt -- ... elts ) -- ... newseq )
    map concat members ; inline