I have an array and I need to double the values of the odd possitions and return the doubled values and the untouched ones in a new array in the same order as they came. I already tried with indexOf() but when a number is repeated in the array it won't double and returns the same. I know I can use a "for", but I'm mostly looking for a direct simple way to keep my code short. I'm using vanilla Javascript.

let num="123456"
let numArray=Array.from(num)

Wanted output:

newArray[1,4,3,8,5,12]

Also, very new developer here...so, sorry if this went too long. Thanks in advance!