Add solution #2619

Author: JoshCrozier

README.md

@@ -362,6 +362,7 @@
 2529|[Maximum Count of Positive Integer and Negative Integer](./2529-maximum-count-of-positive-integer-and-negative-integer.js)|Easy|
 2535|[Difference Between Element Sum and Digit Sum of an Array](./2535-difference-between-element-sum-and-digit-sum-of-an-array.js)|Easy|
 2618|[Check if Object Instance of Class](./2618-check-if-object-instance-of-class.js)|Medium|
+2619|[Array Prototype Last](./2619-array-prototype-last.js)|Easy|
 3392|[Count Subarrays of Length Three With a Condition](./3392-count-subarrays-of-length-three-with-a-condition.js)|Easy|
 3396|[Minimum Number of Operations to Make Elements in Array Distinct](./3396-minimum-number-of-operations-to-make-elements-in-array-distinct.js)|Easy|
 3397|[Maximum Number of Distinct Elements After Operations](./3397-maximum-number-of-distinct-elements-after-operations.js)|Medium|

solutions/2619-array-prototype-last.js

@@ -0,0 +1,18 @@
+/**
+ * 2619. Array Prototype Last
+ * https://leetcode.com/problems/array-prototype-last/
+ * Difficulty: Easy
+ *
+ * Write code that enhances all arrays such that you can call the array.last() method on
+ * any array and it will return the last element. If there are no elements in the array,
+ * it should return -1.
+ *
+ * You may assume the array is the output of JSON.parse.
+ */
+
+/**
+ * @return {null|boolean|number|string|Array|Object}
+ */
+Array.prototype.last = function() {
+  return !this.length ? -1 : this[this.length - 1];
+};