Remove element from

Question

I am trying to remove first element from an array without using any methods recursively. What is wrong in my code?

Answer 1

arr=[1,2,3,4];
function rem(arr){
let res=[];
if(!this.index)  // optional if index is maintaining in outside
    this.index = 0; // optional, this would get created as a global variable & make sure that you haven't use this variable in somewhere else.
if(arr.length>1){
    if (this.index<arr.length-1){
        arr[this.index]=arr[this.index+1];
        this.index++;
        return rem(arr);
    }
    else{
        this.index = undefined; // optional, make it to initial state
        arr.length--;
        return arr;
    }
 }
 this.index = undefined; // optional, make it to initial state
 return res;
 }