September Morn Update

Task/Caesar-cipher/Arc/caesar-cipher-1.arc

@@ -0,0 +1,20 @@
+(= rot (fn (L N)
+  (if
+    (and (<= 65 L) (>= 90 L))
+      (do
+      (= L (- L 65))
+      (= L (mod (+ N L) 26))
+      (= L (+ L 65)))
+    (and (<= 97 L) (>= 122 L))
+      (do
+      (= L (- L 97))
+      (= L (mod (+ N L) 26))
+      (= L (+ L 97))))
+  L))
+
+(= caesar (fn (text (o shift))
+  (unless shift (= shift 13))
+  (= output (map [int _] (coerce text 'cons)))
+  (= output (map [rot _ shift] output))
+  (string output)
+  ))

Task/Caesar-cipher/Arc/caesar-cipher-2.arc

@@ -0,0 +1,2 @@
+(caesar "The quick brown fox jumps over the lazy dog.")
+"Gur dhvpx oebja sbk whzcf bire gur ynml qbt."