From f056bb92efb0c62c90dd13bda249a466c10453bf Mon Sep 17 00:00:00 2001
From: thomasyimgit <thomasyim94@gmail.com>
Date: Sat, 18 Nov 2017 23:01:27 -0500
Subject: [PATCH 1/2] check if reject is undefined and skip redundant add

---
 library/tiny-deferred/index.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/library/tiny-deferred/index.js b/library/tiny-deferred/index.js
index eaa46b7..6ecf968 100644
--- a/library/tiny-deferred/index.js
+++ b/library/tiny-deferred/index.js
@@ -30,7 +30,9 @@
         }
         Deferred.prototype.then = function (resolve, reject) {
             successCallbacks.add(resolve);
-            failCallbacks.add(reject);
+            if (reject) {
+                failCallbacks.add(reject);
+            }
             return this;
         }
         Deferred.prototype.reject = function (errMsg) {

From c9fa3097aa6c7437ba573dd39b76655f44653336 Mon Sep 17 00:00:00 2001
From: thomasyimgit <thomasyim94@gmail.com>
Date: Sat, 18 Nov 2017 23:24:09 -0500
Subject: [PATCH 2/2] add Deferred.race()

---
 library/tiny-deferred/index.js | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/library/tiny-deferred/index.js b/library/tiny-deferred/index.js
index 6ecf968..c994a97 100644
--- a/library/tiny-deferred/index.js
+++ b/library/tiny-deferred/index.js
@@ -63,6 +63,23 @@
         }
         return dfd;
     }
+    Deferred.race = function() {
+        var length = arguments.length;
+        var finished = false;
+        var result = null;
+        var dfd = new Deferred();
+
+        var cb = function(result) {
+            if (!finished) {
+                finished = true;
+                dfd.resolve(result);
+            }
+        }
+        for (var i = 0; i < length; i++) {
+            arguments[i].done(cb)
+        }
+        return dfd;
+    }
 
     if(typeof exports === 'object') {
         module.exports = Deferred;