Question

I would like to have something like this implemented in javasript please:

var hat = new Hat(Hat.Color.RED, Hat.Size.MEDIUM);

How can I do it please (tried to mess with function prototype but with a little success)?

Answer 1

Hat will be a constructor function:

function Hat(color, size) {
    this.id = "X"+color+size; // or anything else
}

On the prototype are “methods” for Hat instances:

Hat.prototype.raise = function() {
    ...
};

But the constants are properties of the Function object:

Hat.Color = {
    RED: "F00",
    GREEN: "0F0",
    ...
};
Hat.Size = {
    MEDIUM: 0,
    LARGE: 1,
    ...
};

If your library implements the “extend” function correctly (nothing special on constructors), this should also work:

Object.extend(Hat, {
    Color: {RED: "F00", GREEN: "0F0", ...},
    Size: = {MEDIUM: 0, LARGE: 1, ...},
});