Function invokeArrayArg

docs/tests/v3/es6/js/sanddance-test-es6.js:40440–40446

* if the argument is an array, we want to execute the fn on each entry * if it aint an array we don't want to do a thing. * this is used by all the methods that accept a single and array argument. * @param {*|Array} arg * @param {String} fn * @param {Object} [context] * @returns {Boolean}

(arg, fn, context)

 * @param {Object} [context]
 * @returns {Boolean}
 */ function invokeArrayArg(arg, fn, context) {
        if (Array.isArray(arg)) {
            each(arg, context[fn], context);
            return true;
        }
        return false;
    }
    /**
 * walk objects and arrays
 * @param {Object} obj