Question

How to cyclically rotate the elements of int array left N times in JavaScript

Answer 1

function rotate_array_left_one_time(arr) {
    const first = arr[0];
    const arr_size = arr.length;
  
    for (let i = 0; i < arr_size - 1; i++) {
        arr[i] = arr[i + 1];
    }
     
    arr[arr_size - 1] = first;
}

let arr = [4, 7, 2, 9, 3];
const arr_size = arr.length;
const n_times = 3;
  
for (let i = 0; i < n_times; i++)
     rotate_array_left_one_time(arr);
       
for (let i = 0; i < arr_size; i++) {
     console.log(arr[i]);
}
     
 
   
     
     
/*
run:
     
9
3
4
7
2
     
*/

 

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