Project's home: http://www.hexstreamsoft.com/projects/map-bind/ MAP-BIND is a macro that allows visual grouping of variables with their corresponding values (not necessarily 1:1) in calls to mapping operators when using an inline LAMBDA. It does so in a way that automatically supports virtually every existing and future mapping operator, all lambda keywords and FUNCALL/APPLY/MULTIPLE-VALUE-CALL variations. It does all this with a surprisingly simple implementation! (map-bind (multiple-value-call #'map 'vector) ((symbol #(a b c)) (number '(1 2 3)) ((&rest others &key &allow-other-keys) (values '(d e f) #(4 5 6))) ((&aux (plus-ten (+ number 10))))) (list (1- number) symbol plus-ten (reverse others))) == (multiple-value-call #'map 'vector (lambda (symbol number &rest others &key &allow-other-keys &aux (plus-ten (+ number 10))) (list (1- number) symbol plus-ten (reverse others))) #(a b c) '(1 2 3) (values '(d e f) #(4 5 6))) => #((0 A 11 (4 D)) (1 B 12 (5 E)) (2 C 13 (6 F))) This library is in the Public Domain. See the UNLICENSE file for details.