Implement exercises till 2.23

2020-10-29 11:47:13 -04:00
parent 936b4e5555
commit 16cd2cea7f
4 changed files with 178 additions and 0 deletions
--- a/util.scm
+++ b/util.scm
@@ -13,4 +13,5 @@
 (define (average a b) (/ (+ a b) 2.0))
 (define (id n) n)
 (define (inc n) (+ n 1))
+(define nil '())