new tasks

Task/Delegates/CoffeeScript/delegates-2.coffee

@@ -0,0 +1,4 @@
+ > coffee foo.coffee
+default implementation
+default implementation
+Delegate Implementation

Task/Delegates/CoffeeScript/delegates.coffee

@@ -0,0 +1,24 @@
+class Delegator
+  operation: ->
+    if @delegate and typeof (@delegate.thing) is "function"
+      return @delegate.thing()
+    "default implementation"
+
+class Delegate
+  thing: ->
+    "Delegate Implementation"
+
+testDelegator = ->
+  # Delegator with no delegate.
+  a = new Delegator()
+  console.log a.operation()
+
+  # Delegator with delegate not implementing "thing"
+  a.delegate = "A delegate may be any object"
+  console.log a.operation()
+
+  # Delegator with delegate that does implement "thing"
+  a.delegate = new Delegate()
+  console.log a.operation()
+
+testDelegator()