- ($ key #!key (default #f)) procedure
It retrieves the value of key if has been set or default otherwise. The procedure supports generilized setters so that you can do:
(set! ($ 'some-key) 'value)
It retrieves the value of key if has been set or default otherwise. The procedure supports generilized setters so that you can do:
(set! ($ 'some-key) 'value)