JavaScript: Push into an Array inside an Object?

Question

Questions:

1. How can I push an Array into another Array located inside an Object?

Example Coding:

var myObj = {      arrayOne: [],      arrayTwo: []  };  var arrayLetters = ['A', 'B'];  /************************************   obj[arrayOne].push(arrayLetters);   RESULT      {       arrayOne: [['A', 'B']],       arrayTwo: []       };  ************************************/ 

Comments:

Essentially, I would like to have an key index for my various arrays.

Answer 1

obj.arrayOne.push(arrayLetters); 

or

obj['arrayOne'].push(arrayLetters);