chickadee » transducers » collect-all

Returns a collector that will return #t if all the items it encounters satisfy pred?. Returns early with #f if pred? is false for any item, but will iterate across the entirety of the data if pred? is always satisfied.

 
(import transducers)

(transduce list-fold
           (inspect (lambda (x)
                      (if (odd? x)
                        (print x " is odd!")
                        (print x " is not odd!"))))
           (collect-all odd?)
           (list 1 2 4 6))

; 1 is odd!
; 2 is not odd!
; => #f

(transduce list-fold
           (inspect (lambda (x)
                      (if (odd? x)
                        (print x " is odd!")
                        (print x " is not odd!"))))
           (collect-all odd?)
           (list 1 3 5 7))

; 1 is odd!
; 3 is odd!
; 5 is odd!
; 7 is odd!
; => #t