variable as index in an associative array - Javascript

Question

I\'m trying to create an associative array, create an empty array, and then add a (indexName -> value) pair:

var arrayName = new Array;

arrayName[\         


        

Answer 1

I did something like like following;

let parentArray = [];
let childArray = [1, 2, 3];
childArray.name = 'my-array-1';
parentArray.push(childArray);

To access that by name in ES6;

parentArray.filter(x => x.name == 'my-array-1');