- mapping-find predicate mapping failureprocedure
Returns the association with the least key of the mapping mapping consisting of a key and value as two values such that predicate returns a true value when invoked with key and value as arguments, or the result of tail-calling failure with no arguments if there is none. There are no guarantees how many times and with which keys and values predicate is invoked.
The hashmap-find procedure exported by (srfi 146 hash) searches in arbitrary order.