javascript convert elements of an array into array for themselves

Question

How can I convert the elements of the array into another array?

let a = [2, 4, 0, 8, 9, 15]

and the result will be :

a = [[2],          


        

Answer 1

let a = [2, 4, 0, 8, 9, 15];
let b = a.map((item) => [item]);