2619. Array Prototype Last

https://leetcode.com/problems/array-prototype-last/

Javascript

Array.prototype.last = function() {
    if (this.length <= 0) {
        return -1
    }
    return this[this.length - 1]
};

Typescript

declare global {
    interface Array<T> {
        last(): T | -1;
    }
}

Array.prototype.last = function() {
    if (this.length <= 0) {
        return -1
    }
    return this[this.length - 1]
};