From 7b7bf727da3250907284368b98b0083a4b4e2386 Mon Sep 17 00:00:00 2001
From: mryouse
Date: Sat, 3 Jun 2023 20:22:18 +0000
Subject: initial commit

---
 p99/p19.neb | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 p99/p19.neb

(limited to 'p99/p19.neb')

diff --git a/p99/p19.neb b/p99/p19.neb
new file mode 100644
index 0000000..09ff324
--- /dev/null
+++ b/p99/p19.neb
@@ -0,0 +1,15 @@
+; P19 Rotate a list N places to the left.
+
+(def a (list "a" "b" "c" "d" "e" "f" "g" "h"))
+
+(func rotate (lst cnt)
+    (branch
+        ((eq? 0 cnt) lst)
+        ((> cnt 0)
+            (rotate (append (rest lst) (first lst)) (- cnt 1)))
+        ((< cnt 0)
+            (rotate (prepend (most lst) (last lst)) (+ cnt 1)))))
+
+(print (->string a))
+(print (->string (rotate a 3)))
+(print (->string (rotate a (- 2))))
-- 
cgit v1.2.3