# 代理模式 給某個流程添加一個中間人 ## 示例 ```js // 創建一個班長 var monitor = { homeworks: [] }; // 老師構造函數 function Teacher(name) { this.teacherName = name; this.homeworks = [] } // 收一份作業 monitor.add = function(homework){ this.homeworks.push(homework) } // 交作業 monitor.send = function(teacher) { teacher.homeworks = this.homeworks; this.homeworks = []; console.log('已經把作業交給 ' + teacher.teacherName + ' 老師'); } monitor.add('張三的作業'); monitor.add('李四的作業'); var niu = new Teacher('牛老師') monitor.send(niu); console.log(niu.homeworks);