Question

How to cyclically rotate the elements of int array left by one in Node.js

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 = [5, 4, 7, 2, 9, 3];

rotate_array_left_one_time(arr);

const arr_size = arr.length;

for (let i = 0; i < arr_size; i++) {
     console.log(arr[i]);
}
      
  
    
      
      
/*
run:
      
4
7
2
9
3
5
      
*/

 

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