How to convert a string of numbers to an array of numbers?

Question

I have below string -

var a = \"1,2,3,4\";

when I do -

var b = a.split(\',\');

I get b as

Answer 1

You can transform array of strings to array of numbers in one line:

const arrayOfNumbers = arrayOfStrings.map(e => +e);

Answer 2

You can use JSON.parse, adding brakets to format Array

const a = "1,2,3,4";
const myArray = JSON.parse(`[${a}]`)
console.log(myArray)
console.info('pos 2 = ',  myArray[2])

Answer 3

One liner

Array.from(a.split(','), Number)