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

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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
        [ [ [ drop ] 2bi ] dip [ delete-at ] 2curry unless ]
        2curry assoc-each
    ] [ drop ] 2bi ; inline