last

Returns the last element in an array.

Check if arr is truthy and has a length property, use arr.length - 1 to compute the index of the last element of the given array and return it, otherwise return undefined.

typescript

const last = (arr: any[] = []) => arr[arr.length - 1];

typescript

last([1, 2, 3]); // 3
last([]); // undefined
last([null]); // null
last(undefined); // undefined