(iter-next-back! it) it: an iter returns any type
F
Advances the back of a double-ended iterator.
The argument must be double-ended. If it's
finished, returns #n
. Otherwise, advances the back of the
iterator and returns the value produced.
(iter-next-back! it) it: an iter returns any type
Advances the back of a double-ended iterator.
The argument must be double-ended. If it's
finished, returns #n
. Otherwise, advances the back of the
iterator and returns the value produced.