Dynamically updating a JavaScript object from a string path [duplicate]

Answer 1

Refactoring Accessing nested JavaScript objects with string key

I get

var path = "store>book>0>price"
Object.byString = function(o, s) {
    var a = s.split('>');
    while (a.length) {
        var n = a.shift();
        if (n in o) {
            o = o[n];
        } else {
            return;
        }
    }
    return o;
}


function updateObject(data, path) {
  object2update= Object.byString(data, path);
}