Tiny component & entities module

gistfile1.js

var componentsList = {};

function Component(name, func) {
    componentsList[name] = func;
}

//Components are created like this:
Component('flying', function(o) {
    o.flying = true;
});

var entitiesIDs = [];

function addComponent() {
    for (var i = 0; i < arguments.length; i++) {
        if (typeof arguments[i] === typeof []) {
            for (var j = 0; j < arguments[i].length; j++) {
                componentsList[arguments[i][j]](this);
            }
        } else {
            componentsList[arguments[i]](this);
        }
    }
}

function Entity() {
    var obj = {
        addComponent: addComponent,
        id: entitiesIDs.length
    };
    entitiesIDs.push(obj.id);
    addComponent.apply(obj, arguments);
    return obj;
}

//Entities are created like this:
var user = Entity('flying');

//Bundles are made with arrays:
var orcs = ['health', 'collision', 'enemy', 'ai', 'armed', 'green'];
var enemy1 = Entity(orcs);

//You can combine multiple bundles and strings:
var enemy2 = Entity(orcs, 'rage', undead, 'axe');