2016 Update

Task/Rot-13/AppleScript/rot-13-4.applescript

@@ -0,0 +1,61 @@
+-- rot13 :: String -> String
+on rot13(str)
+    script rt13
+        on lambda(x)
+            if (x ≥ "a" and x ≤ "m") or (x ≥ "A" and x ≤ "M") then
+                character id ((id of x) + 13)
+            else if (x ≥ "n" and x ≤ "z") or (x ≥ "N" and x ≤ "Z") then
+                character id ((id of x) - 13)
+            else
+                x
+            end if
+        end lambda
+    end script
+
+    intercalate("", map(rt13, characters of str))
+end rot13
+
+
+-- TEST
+on run
+
+    rot13("nowhere ABJURER")
+
+    -->  "abjurer NOWHERE"
+
+end run
+
+
+-- GENERIC FUNCTIONS
+
+-- map :: (a -> b) -> [a] -> [b]
+on map(f, xs)
+    tell mReturn(f)
+        set lng to length of xs
+        set lst to {}
+        repeat with i from 1 to lng
+            set end of lst to lambda(item i of xs, i, xs)
+        end repeat
+        return lst
+    end tell
+end map
+
+-- intercalate :: Text -> [Text] -> Text
+on intercalate(strText, lstText)
+    set {dlm, my text item delimiters} to {my text item delimiters, strText}
+    set strJoined to lstText as text
+    set my text item delimiters to dlm
+    return strJoined
+end intercalate
+
+-- Lift 2nd class handler function into 1st class script wrapper
+-- mReturn :: Handler -> Script
+on mReturn(f)
+    if class of f is script then
+        f
+    else
+        script
+            property lambda : f
+        end script
+    end if
+end mReturn