Javascript Leetcode Problem Array Prototype E9Q50Oll4I

Web Reference: The key insight here is that we need to modify JavaScript's built-in Array type to add custom behavior. In JavaScript, all arrays inherit from Array.prototype, which means if we add a method to Array.prototype, every array instance will automatically have access to that method. Array Prototype Last The task is to return the last element of an array. If the array is empty, return -1. 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.

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