dlist-filter ( ... dlist quot: ( ... value -- ... ? ) -- ... dlist' )
Factor handbook » The language » Collections » Double-linked lists

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Vocabulary
dlists

Inputs

dlist	a dlist
quot	a quotation

Outputs

dlist'

a dlist

Word description
Applies the quotation to each element of the dlist in turn, removing the corresponding nodes if the quotation returns f.

Side effects
Modifies dlist

Definition

USING: deques kernel ;

IN: dlists

: dlist-filter
    ( ... dlist quot: ( ... value -- ... ? ) -- ... dlist' )
    <dlist>
    [ [ push-back ] curry [ [ drop ] 1if ] 2curry dlist-each ]
    keep ; inline