Program for array rotation

array-rotation.js

// Program for array rotation
// https://www.geeksforgeeks.org/array-rotation/
function rotate(arr, d, n) {
  // Write a function rotate(ar[], d, n) that rotates arr[] of size n by d elements.
  const stash = arr.splice(0, d);
  return arr.concat(stash);
}

const arr = [1,2,3,4,5,6,7];
const res = rotate(arr, 2, arr.length);
console.log(res.join(',') === '3,4,5,6,7,1,2');