Is it possible to use a variable with a string to identify another varible?

Question

Im wonder if it is possible to use a string from a varible to identify another varible with an array?

Im runing the code on chrome.

See code to see what i mean.

Thanks!

var box_1 = new Array()

var boxid;

boxid = "box_1";

boxid.push("Is this possible?");

Answer 1

classical way

use an object to refer your array

let obj = {
    box1 : []
};
obj['box1'].push('ok!')
console.log(obj.box1)

bad

beware of eval, just avoid it

let box1 = []
eval('box1.push("brrr")')
console.log(box1)