Abstract
Return the element at index i. Negative indices count from the end.
i
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/at
Find the first element of the iterable that satisfies the predicate.
Gets the first element of the iterable.
Gets the last element of the iterable.
Return the element at index
i. Negative indices count from the end.