Lodash's .get() similar

get.js

/**
 *
 * @param {any} defaultValue
 * @param {String} propertyPath 'a.b.c.4'
 * @param {any} obj | defaultValue
 * @example getValue('foo', 'a.b.c.4', { a:{ b:{ c: [0, 1, 2, 3] } } }) // 3
 */
var getValue = exports.getValue = function (defaultValue, propertyPath, obj) {
    var paths = propertyPath.split('.');
    var currentObj = obj;

    if (!obj) { return defaultValue; }

    return paths.reduce(function(acc, key) {
        var currentValue = currentObj[key];

        if (currentValue === undefined || currentValue === null) {
            return defaultValue;
        }

        if (typeof currentValue === 'object') {
            currentObj = currentObj[key];
            return currentValue;
        }

        return currentValue;
    }, defaultValue);
};