chickadee » srfi-171 » revery

The reducer version of every. Stops the transduction and returns (reduced #f) if any (pred? value) returns #f. If every (pred? value) returns true, it returns the result of the last invocation of (pred? value). The identity is #t.

(list-transduce
  (tmap (lambda (x) (+ x 1)))
  (revery (lambda (v) (if (odd? v) v #f)))
  (list 2 4 6))

=> 7

(list-transduce (tmap (lambda (x) (+ x 1)) (revery odd?) (list 2 4 5 6)) => #f