Re: MAP (and variants) vs LOOP - Popular opinion observation?

Then suppose you later need the loop/map to collect some of the values
under certain conditions. You might have
 
   (loop for x in (get-list)
         for i from 0
         do (format t "~A - ~A~%" i x)
         if (test x)
         collect (foo x))

Gauche Scheme

(use srfi-13)  ;; string-upcase

(filter-map
  (lambda (x i)  (print i " - " x)
    (and (string? x) (string-upcase x)))
  '(foo "an" 8 "why")
  (lrange 0))

0 - foo
1 - an
2 - 8
3 - why
("AN" "WHY")