of ( assoc key -- value/f )
Factor handbook > The language > Collections > Associative mapping operations > Lookup and querying of assocs

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Inputs and outputs
assocan assoc
keyan object
value/fthe value associated to the key, or f if the key is not present in the assoc

Word description
Looks up the value associated with a key. This word makes no distinction between a missing value and a value set to f; if the difference is important, use ?of.

See also
at, at*, key?, ?at, ?of


: of ( assoc key -- value/f ) swap at ; inline