2016 Update

Task/Identity-matrix/AppleScript/identity-matrix.applescript

@@ -0,0 +1,77 @@
+-- idMatrix :: Int -> [(0|1)]
+on idMatrix(n)
+    set xs to range(1, n)
+
+    script row
+        on lambda(x)
+            script zeroOrOne
+                on lambda(i)
+                    cond(i = x, 1, 0)
+                end lambda
+            end script
+
+            map(zeroOrOne, xs)
+        end lambda
+    end script
+
+    map(row, xs)
+end idMatrix
+
+
+-- TEST
+on run
+
+    idMatrix(5)
+
+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
+
+-- 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
+
+-- cond :: Bool -> a -> a -> a
+on cond(bool, f, g)
+    if bool then
+        f
+    else
+        g
+    end if
+end cond
+
+-- range :: Int -> Int -> [Int]
+on range(m, n)
+    if n < m then
+        set d to -1
+    else
+        set d to 1
+    end if
+    set lst to {}
+    repeat with i from m to n by d
+        set end of lst to i
+    end repeat
+    return lst
+end range