September 2017 Update

Task/Sort-an-integer-array/AppleScript/sort-an-integer-array.applescript

@@ -1,34 +1,43 @@
 use framework "Foundation"
-use scripting additions
 
-on sort:lst
-    tell current application
-        return ((its (NSArray's arrayWithArray:lst))'s ¬
-            sortedArrayUsingDescriptors:{its (NSSortDescriptor's ¬
-                sortDescriptorWithKey:"self" ascending:true selector:"compare:")}) as list
-    end tell
-end sort:
+-- sort :: [a] -> [a]
+on sort(lst)
+    ((current application's NSArray's arrayWithArray:lst)'s ¬
+        sortedArrayUsingSelector:"compare:") as list
+end sort
 
+-- TEST -----------------------------------------------------------------------
 on run
 
-    map(sort_, [[9, 1, 8, 2, 8, 3, 7, 0, 4, 6, 5], ¬
-        ["alpha", "beta", "gamma", "delta", "epsilon", "zeta", "eta", "theta", "iota", "kappa", "lambda", "mu"]])
+    map(sort, [[9, 1, 8, 2, 8, 3, 7, 0, 4, 6, 5], ¬
+        ["alpha", "beta", "gamma", "delta", "epsilon", "zeta", "eta", ¬
+            "theta", "iota", "kappa", "lambda", "mu"]])
 
 end run
 
 
--- GENERIC FUNCTION FOR THE TEST
+-- GENERIC FUNCTIONS  ---------------------------------------------------------
 
 -- map :: (a -> b) -> [a] -> [b]
 on map(f, xs)
-    script mf
-        property lambda : f
-    end script
-
-    set lng to length of xs
-    set lst to {}
-    repeat with i from 1 to lng
-        set end of lst to mf's lambda(item i of xs, i, xs)
-    end repeat
-    return lst
+    tell mReturn(f)
+        set lng to length of xs
+        set lst to {}
+        repeat with i from 1 to lng
+            set end of lst to |λ|(item i of xs, i, xs)
+        end repeat
+        return lst
+    end tell
 end map
+
+-- 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 |λ| : f
+        end script
+    end if
+end mReturn