I want to create random number generator. I have a quantity array. So I push when I create a random number. quantityArray.push([Math.floor(Math.random() * (endRange - startRange + 1)) + startRange]);

It's work but this array elements are must be unique. So I write check method like this:

let uniqueSites = quantityArray.sort();
                    let temp = uniqueSites[0];

                    for(let z =1; z<=uniqueSites.length; z++)
                    {
                        if(temp == uniqueSites[z])
                        {
                          uniqueSites.pop(uniqueSites[z]);
                        }
                    } 
    ```

But doesn't work. In my opinion, I removed element and I check length after if length same array is unique else create a random number and push array.