(dict-ref dict key default) -> value
Returns the value associated with key in dictionary. If the key is not found, the supplied default is returned, or #f if there is no default.
Examples:
>>(define a (dict '(alpha 1) '(beta 2) '(gamma 3))) :: #f >>(dict-ref a 'alpha) :: (1) >>(dict-ref a 'delta) :: #f