collect-index-by! ( ... assoc seq quot: ( ... obj -- ... key ) -- ... assoc )

Vocabulary

assocs.extras

Inputs

assoc	an object
seq	an object
quot	a quotation with stack effect ( ... obj -- ... key )

Outputs

assoc

an object

Definition

USING: assocs kernel sequences ;

IN: assocs.extras

: collect-index-by!
    ( ... assoc seq quot: ( ... obj -- ... key ) -- ... assoc )
    rot [ '[ @ swap _ push-at ] each-index ] keep ; inline