Vocabulary
assocs

Inputs and outputs

value	an object
key	an object
assoc	an assoc

Word description
Pushes the value onto a vector stored at the key in the assoc. If the key does not yet exist, creates a new vector at that key and pushes the value.

Examples

USING: prettyprint assocs kernel ; H{ { "cats" V{ "Mittens" } } } "Mew" "cats" pick push-at .
H{ { "cats" V{ "Mittens" "Mew" } } }

Definition

USING: vectors ;

IN: assocs

: push-at ( value key assoc -- ) [ ?push ] change-at ;