Revert "Reduce number of array"

This reverts commit 974b8596.

lib/rsvp/queue.js

@@ -12,30 +12,39 @@ function ResolvedQueueError(message) {
 ResolvedQueueError.prototype = new Error();
 ResolvedQueueError.prototype.constructor = ResolvedQueueError;
 
+var last_promise,
+  i;
+
 var Queue = function() {
   if (!(this instanceof Queue)) {
     return new Queue();
   }
 
-  var promise_stack = [],
-    // handleQueue
-    detect_end_index = 1;
+  var queue = this,
+    promise_stack = [],
+    then_stack = [];
 
-  Promise.call(this, function (resolveQueue, rejectQueue) {
+  Promise.call(queue, function (resolveQueue, rejectQueue) {
     var detectQueueSuccess,
       detectQueueError;
 
     function handleQueue() {
-      if (promise_stack.length === detect_end_index) {
+      if (then_stack.length === 0) {
         return true;
       }
-      promise_stack.splice(0, detect_end_index);
+
+      last_promise = promise_stack[promise_stack.length - 1];
+      promise_stack.splice(0, promise_stack.length);
+      for (i = then_stack.length - 1; i >= 0; i -= 2) {
+        last_promise = last_promise.then(then_stack[i - 1], then_stack[i]);
+        promise_stack.push(last_promise);
+      }
+      then_stack.splice(0, then_stack.length);
 
       promise_stack.push(
-        promise_stack[promise_stack.length - 1].then(detectQueueSuccess,
-                                                     detectQueueError)
+        last_promise.then(detectQueueSuccess,
+                          detectQueueError)
       );
-      detect_end_index = promise_stack.length;
       return false;
     }
 
@@ -55,32 +64,31 @@ var Queue = function() {
 
     // Resolve by default
     promise_stack.push(
-      resolve().then(detectQueueSuccess)
+      resolve().then(detectQueueSuccess, detectQueueError)
     );
 
   }, function () {
     // Cancel all created promises
     var i;
+    then_stack.splice(0, then_stack.length);
     for (i = 0; i < promise_stack.length; i += 1) {
       promise_stack[i].cancel();
     }
 
   });
 
-  this.push = function (done, fail) {
-    if (this.isFulfilled || this.isRejected) {
+  queue.push = function (done, fail) {
+    if (queue.isFulfilled || queue.isRejected) {
       throw new ResolvedQueueError();
     }
-    promise_stack.push(
-      promise_stack[promise_stack.length - 1].then(done, fail)
-    );
-    return this;
+    then_stack.unshift(done, fail);
+    return queue;
   };
 
-  return this;
+  return queue;
 };
 
 Queue.prototype = Object.create(Promise.prototype);
 Queue.prototype.constructor = Queue;
 
-export { Queue, ResolvedQueueError };
\ No newline at end of file
+export { Queue, ResolvedQueueError };