npm i forlist

    var nums = [1, 2, 3, 4];
    var number = nums.nthElement(2); // 3

    var nums = [1, 2, 3, 4];
    var number = nums.firstElement; // 1

    var nums = [1, 2, 3, 4];
    var number = nums.lastElement; // 4

npm run test