Complete the function in the editor. It has one parameter: an array, . It must iterate through the array performing one of the following actions on each element:
/*
* Modify and return the array so that all even elements are doubled and all odd elements are tripled.
*
* Parameter(s):
* nums: An array of numbers.
*/
function modifyArray(nums) {
return (nums || []).map(num => num * (num % 2 === 0 ? 2 : 3));