Good exercices on JS in MaxMSP?

autowatch = 1;
inlets = 2;
outlets = 2;

// Max special functions
var msg_int = function (v)
{
    post("received integer value :", v ,"n");
};

var list = function (a)
{
    post(arrayfromargs(arguments),"n");
};

// get properties of all objects
var bang = function ()
{
    this.patcher.apply( function (a)
        {
            var colProps = Object.getOwnPropertyNames(a);
            if (colProps) post(colProps,"n");
        }
        );
}

// js typed array work in Max but not in OSX jsc
function testtypedarray()
{
    // eg.
    var colBytes = new Uint8Array(32);
    var colBytes = new Uint16Array(32);
}

// Dict Object if you don't know before
function dictionary(dict_name)
{
    var d = new Dict(dict_name);
    var keys = d.getkeys();

    if (!keys)
    {
        // If no keys (or empty dictionary)
        post("no keys","n");
    }
    else if ((typeof keys) == (typeof "string"))
    {
        // If dict have only one key
        post("you have one key","n");
    }
    else if (keys instanceof Array)
    {
        // If dict have more than one keys
        post("you have more keys","n");
    }

}