Loopless provides many functions analogous to
mapl/maplist/mapcon for iteration
(and possible accumulation of values into a list) over alists, plists,
vectors and integers.
Not all details of these functions are rehashed here since the HyperSpec already provides a thorough description of the Common Lisp functions above that serve as a template for the Loopless functions below.
mapcar and friends in the HyperSpec.