javascript设计模式——单例模式

摘要：控制共享实例

    var LazySingle = (function(){
      var _instance = null
      var Single = function () {
        return {
          publicMethod: function (){},
          publicProperty: 'test'
        }
      }
      return function () {
        if (!_instance) {
          _instance = new Single()
        }
        return _instance
      }
    })()
    console.log(LazySingle().publicProperty)