Fux bug of sort() function in cookie assign

Author: lewis617

ArrayList/ArrayList.js

@@ -188,7 +188,9 @@ function ArrayList() {
 
   this.findContentChildren = function (cookies) {
     this.quickSort();
-    cookies.sort();
+    cookies.sort(function (a, b) {
+      return a - b;
+    });
     var i = 0;  // 满足的孩子数量
     for (var j = 0; i < array.length && j < cookies.length; j++) {  // 遍历饼干
       if (array[i] <= cookies[j]) {

ArrayList/ArrayList.test.js

@@ -73,4 +73,13 @@ test('ArrayList', function () {
   array = createNonSortedArray();
   expect(array.findContentChildren([1, 1])).toBe(1);
   expect(array.findContentChildren([1, 2, 3])).toBe(3);
+
+  // test for sort() function, eg: 10 and 9, sort will return a wrong answer.
+  array = new ArrayList();
+  array.insert(10);
+  array.insert(9);
+  array.insert(8);
+  array.insert(7);
+  array.insert(6);
+  expect(array.findContentChildren([7, 6, 5])).toBe(2);
 });