Get value from object by key

get_object_value.js

/**
 * Get value from object by key
 * @param obj
 * @param key
 * @param defaultValue
 * @returns {*}
 */
function getObjectValue(obj, key, defaultValue) {
    defaultValue = defaultValue || null;

    if (typeof obj === 'undefined') {
        return defaultValue;
    }

    var _index = key.indexOf('.');

    if (_index > -1) {
        var resultValue = getObjectValue(
            obj[key.substring(0, _index)],
            key.substr(_index + 1),
            defaultValue
        );

        return resultValue;
    }

    return obj[key] || defaultValue;
}