Updated bubble sort to more traditional style (using swap method)

Author: Nicholas C. Zakas

algorithms/sorting/bubble-sort/bubble-sort.js

@@ -8,16 +8,27 @@
  * A bubble sort implementation in JavaScript. The array
  * is sorted in-place.
  * @param {Array} items An array of items to sort.
+ * @return {void}
  */
-
-function sort(items){
+function bubbleSort(items){
     for (var i=items.length-1; i >= 0; i--){
         for (var j=i; j >= 0; j--){
             if (items[j] < items[j-1]){
-                var temp = items[j];
-                items[j] = items[j-1];
-                items[j-1] = temp;
+                swap(items, j, j-1);
             }
         }
     }
+}
+
+/**
+ * Swaps two values in an array.
+ * @param {Array} items The array containing the items.
+ * @param {int} firstIndex Index of first item to swap.
+ * @param {int} secondIndex Index of second item to swap.
+ * @return {void}
+ */
+function swap(items, firstIndex, secondIndex){
+    var temp = items[firstIndex];
+    items[firstIndex] = items[secondIndex];
+    items[secondIndex] = temp;
 }