add 2619

Author: fishercoder1534

Diff for: javascript/_2619.js

@@ -0,0 +1,14 @@
+/**
+ * @return {null|boolean|number|string|Array|Object}
+ */
+Array.prototype.last = function () {
+    if (this.length === 0) {
+        return -1;
+    }
+    return this[this.length - 1];
+};
+
+/**
+ * const arr = [1, 2, 3];
+ * arr.last(); // 3
+ */

Diff for: paginated_contents/javascript/README.md

@@ -1,3 +1,4 @@
 | #    | Title                                                                                                                                                                                      | Solutions                                                                           | Video                                | Difficulty                               | Tag                                                                  
 |------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------|--------------------------------------|------------------------------------------|----------------------------------------------------------------------
-| 2703 | [Return Length of Arguments Passed](https://leetcode.com/problems/return-length-of-arguments-passed/)                                                                                                            | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/javascript/_2703.js) |                                      | Easy                                     | Javascript
+| 2703 | [Return Length of Arguments Passed](https://leetcode.com/problems/return-length-of-arguments-passed/)                                                                                                            | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/javascript/_2703.js) |                                      | Easy                                     | Javascript
+| 2619 | [Array Prototype Last](https://leetcode.com/problems/array-prototype-last/)                                                                                                            | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/javascript/_2619.js) |                                      | Easy                                     | Javascript