assoc-filter! ( ... assoc quot: ( ... key value -- ... ? ) -- ... assoc )
Factor handbook » The language » Collections » Associative mapping operations » Associative mapping combinators

Prev:	assoc>map ( ... assoc quot: ( ... key value -- ... elt ) exemplar -- ... seq )
Next:	assoc-reject! ( ... assoc quot: ( ... key value -- ... ? ) -- ... assoc )

Vocabulary
assocs

Inputs

assoc	an assoc
quot	a quotation with stack effect ( ... key value -- ... ? )

Outputs

assoc

an assoc

Word description
Removes all entries for which the predicate quotation yields true.

Side effects
Modifies assoc

See also
assoc-filter, assoc-filter-as

Definition

USING: kernel ;

IN: assocs

: assoc-filter!
    ( ... assoc quot: ( ... key value -- ... ? ) -- ... assoc )
    over [
        [ delete-at ] curry
        [ [ keepd swap [ drop ] ] curry ] dip [ if ] curry
        compose assoc-each
    ] keep ; inline