arr_move.js

/**
 * move k index from array
 * @param {number[]} arr
 * @param {number} k
 */
function move(arr, k) {
  if (k == 0) {
    return arr;
  }
  let length = arr.length;
  k = Math.abs(k) % length;
  if (k === length) {
    return arr;
  }

  if (k > 0) {
    return arr.slice(length - k).concat(arr.slice(0, length - k));
  }

  if (k < 0) {
    return arr.slice(k, length).concat(arr.slice(0, k));
  }
}

const arr = [1, 2, 3, 4, 5];
console.log(0, move(arr, 0));
console.log(1, move(arr, 1));
console.log(2, move(arr, 2));
console.log(6, move(arr, 6));
console.log(-1, move(arr, -1));
console.log(-2, move(arr, -2));
console.log(-6, move(arr, -6));

// 0 [ 1, 2, 3, 4, 5 ]
// 1 [ 5, 1, 2, 3, 4 ]
// 2 [ 4, 5, 1, 2, 3 ]
// 6 [ 5, 1, 2, 3, 4 ]
// -1 [ 5, 1, 2, 3, 4 ]
// -2 [ 4, 5, 1, 2, 3 ]
// -6 [ 5, 1, 2, 3, 4 ]