Using variables with nested Javascript object

Question

Suppose I have this:

var a = { A : { AA : 1 }, B : 2 };

Is there a way for me to create a variable that could allow me to reference either

Answer 1

Since i also encounter this problem, i wrote also a one line util for this (ES6):

const leaf = (obj, path) => (path.split('.').reduce((value,el) => value[el], obj))

Example:

const objSample = { owner: { name: 'Neo' } };
const pathSample = 'owner.name';

leaf(objSample, pathSample) //'Neo'