Jim12345

Dave,

That is good to know but I was thinking it doesn't help me on this issue.

Old school code would look like this:

var saver = function (value) {return value;    };alert (saver(10));

I am still getting my 10 but without the extra function in a function.

Maybe a better example of a closure might help me here?

One that it is clear that, "now I know why closures are important" ?

Jim

Hello,

I am looking over code plus the concept of closures. Below is the code:

Closures are a powerful tool but can be tricky to understand. Mastering them, however, will allow you to write some very elegant code.

Here’s an example:

var saver = function (value) {    return function () {        return value;    };};var retriever = saver(10);alert(retriever());

So the code alerts 10. If you rewrite the last line to be console.log(retriever);

You get this:

function () { return value; }

I can watch the original code execute in Chrome Debugging Tools, but it doesn't help to understand it.

Does anyone know I resource where I can watch say a table where the functions get created and variables get passed? Or can you create the table right here?

Years ago a read a book about C and the author used tables to simulate memory locations for say functions, pointer to functions, variables and

passing values by reference, etc.

Thanks,

Jim

Ah OK Thanks Foxy Mod so a private function not accessible to the outside world? Meaning you can't call it from outside it's scope?

Don,

I was trying to do this:

draw = function(){ return (this.width); };

Instead of this:

this.draw = function(){ return (this.width); };

Thanks,

Jim P.

Hello,

I have a question about prototypes. It seems to me I always encounter a new method being added to an object after the fact. For example this code below runs fine.

<script>var GameObject = function(width, height) { this.x = Math.floor((Math.random() ) + 1); this.y = Math.floor((Math.random() ) + 1); this.width = width; this.height = height; this.car='AMC'; return this;};GameObject.prototype = { draw: function() { return (this.width); }};var n = new GameObject(2200,400);console.log(n.draw());</script>

But what I want to do is right from the get go, have the method draw as part of the protoype, this I can't figure out. So what would the code look like?

Thanks,

Jim P.