Access object child properties using a dot notation string [duplicate]

Answer 1

Here is a a little better way then @andy's answer, where the obj (context) is optional, it falls back to window if not provided..

function getDescendantProp(desc, obj) {
    obj = obj || window;
    var arr = desc.split(".");
    while (arr.length && (obj = obj[arr.shift()]));
    return obj;
};