Just another update

Task/Caesar-cipher/Groovy/caesar-cipher-2.groovy

@@ -0,0 +1,7 @@
+def caesarEncode(cipherKey, text) {
+    text.chars.collect { c ->
+        int off = c.isUpperCase() ? 'A' : 'a'
+        c.isLetter() ? (((c as int) - off + cipherKey) % 26 + off) as char : c
+    }.join()
+}
+def caesarDecode(cipherKey, text) { caesarEncode(26 - cipherKey, text) }