June 2018 Update

Task/Rot-13/Elena/rot-13.elena

@@ -0,0 +1,30 @@
+import system'routines.
+import extensions.
+
+singleton rotConvertor
+{
+    char convert(char ch)
+    [
+        if (($97 <= ch) && (ch <= $109) || ($65 <= ch) && (ch <= $77))
+        [
+            ^ (ch toInt + 13) toChar
+        ].
+        if (($110 <= ch) && (ch <= $122) || ($78 <= ch) && (ch <= $90))
+        [
+            ^ (ch toInt - 13) toChar
+        ].
+
+        ^ ch
+    ]
+
+    literal convert(literal s)
+        = s selectBy(:ch)(rotConvertor convert(ch)); summarize(String new).
+}
+
+program =
+[
+    if ('program'arguments length > 1)
+    [
+        console printLine(rotConvertor convert('program'arguments[1])).
+    ]
+].