blob: 0c5af898a46731a83e40a1b626724002fc36168b (
about) (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
(module (algebraic-structs foldable vector base) (foldl foldr)
(import scheme
(only (chicken base) add1 sub1))
(define (foldl f z v)
(let ((len (vector-length v)))
(let loop ((i 0)
(acc z))
(if (= i len)
acc
(loop (add1 i)
(f acc (vector-ref v i)))))))
(define (foldr f z v)
(let ((len (vector-length v)))
(let loop ((i (sub1 len))
(acc z))
(if (< i 0)
acc
(loop (sub1 i)
(f (vector-ref v i) acc)))))))
|
