Merge pull request #12 from nathan7/defer-class

make 'deferred' objects into a class

Author: ForbesLindesay

index.js

@@ -20,7 +20,7 @@ function Promise(fn) {
 
   this.then = function(onFulfilled, onRejected) {
     return new Promise(function(resolve, reject) {
-      handle({ onFulfilled: onFulfilled, onRejected: onRejected, resolve: resolve, reject: reject })
+      handle(new Handler(onFulfilled, onRejected, resolve, reject))
     })
   }
 
@@ -31,7 +31,7 @@ function Promise(fn) {
     }
     nextTick(function() {
       var cb = state ? deferred.onFulfilled : deferred.onRejected
-      if (typeof cb !== 'function'){
+      if (cb === null) {
         (state ? deferred.resolve : deferred.reject)(value)
         return
       }
@@ -95,3 +95,11 @@ function Promise(fn) {
   try { fn(resolve, reject) }
   catch(e) { reject(e) }
 }
+
+
+function Handler(onFulfilled, onRejected, resolve, reject){
+  this.onFulfilled = typeof onFulfilled === 'function' ? onFulfilled : null
+  this.onRejected = typeof onRejected === 'function' ? onRejected : null
+  this.resolve = resolve
+  this.reject = reject
+}