javascript设计模式之单例模式

var mySingleton = {
    property: "a property",
    method: function () {
        console.log("this is a method");
    }
};

var mySingleton = (function () {

    var instance,
        init = function () {
            return {
                property: "a property",
                method: function () {}
            };
        };

    return {
        getInstance: function () {
            return instance || (instance = init());
        }
    };
})();

var mysingle = mySingleton.getInstance();

var mySingleton = (function () {

    var Singleton = function (args) {

        var args = args || {};

        this.name = "a singleton";
        this.pointX = args.pointX || 6;
        this.pointY = args.pointY || 10;
    };

    var instance;

    var exports = {
        getInstance: function (args) {

            if (instance === undefined) {
                instance = new Singleton(args);
            }
            return instance;
        }
    };

    return exports;
})();

var mysingle = mySingleton.getInstance({
    pointX: 10,
    pointY: 10
});