Access last element of a TypeScript array

Question

Is there a notation to access the last element of an array in TypeScript? In Ruby I can say: array[-1]. Is there something similar?

Answer 1

If you need this call more often it's possible to declare it globally:

interface Array {
    last(): T | undefined;
}
if (!Array.prototype.last) {
    Array.prototype.last = function () {
        if (!this.length) {
            return undefined;
        }
        return this[this.length - 1];
    };
}

then you can just call

items.last()