delete-at* ( key assoc -- value/f ? )
Factor handbook » The language » Collections » Associative mapping operations » Storing keys and values in assocs

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rename-at ( newkey key assoc -- )

Vocabulary
assocs

Inputs

key	a key
assoc	an assoc

Outputs

value/f	the previous value or f
?	a boolean

Word description
Removes an entry from the assoc and outputs the previous value together with a boolean indicating whether it was present.

Side effects
Modifies assoc

See also
delete-at, ?delete-at

Definition

USING: kernel ;

IN: assocs

: delete-at* ( key assoc -- value/f ? )
    [ at* ] [ delete-at ] 2bi ;