--- /dev/null
+
+
+ /**
+ * Array lastIndexOf
+ */
+ function lastIndexOf(arr, item, fromIndex) {
+ if (arr == null) {
+ return -1;
+ }
+
+ var len = arr.length;
+ fromIndex = (fromIndex == null || fromIndex >= len)? len - 1 : fromIndex;
+ fromIndex = (fromIndex < 0)? len + fromIndex : fromIndex;
+
+ while (fromIndex >= 0) {
+ // we iterate over sparse items since there is no way to make it
+ // work properly on IE 7-8. see #64
+ if (arr[fromIndex] === item) {
+ return fromIndex;
+ }
+ fromIndex--;
+ }
+
+ return -1;
+ }
+
+ module.exports = lastIndexOf;
+