/*  * 小游戏演示中介者模式 * Home 按键 1 * Guest 按键 0 * 半分钟内看谁按下的次数多 * * 参与的对象： *   玩家 *   计分板 *   中介者 * * 中介者模式使对象之间松耦合，提高了可维护性*/// 玩家var Player = function (name) {    this.name = name;    this.point = 0;};Player.prototype.play = function () {    this.point += 1;    mediator.played(); // 每次玩家按键，中介者更新计分板};// 计分板var scoreboard = {    element: document.getElementById("result"), // 记录比分    update: function (score) {        var msg = "",            i;        for (i in score) {            if (score.hasOwnProperty(i)) {                msg += ‘<p><strong>‘ + i + ‘</strong>: ‘ + score[i] + ‘</p>‘;            }        }        this.element.innerHTML = msg;    }};// 计分人（中介者）var mediator = {    // 所有的玩家（player 对象）    players: {},    // 玩家就位    setup: function () {        var players = this.players;        players.home = new Player("Home");        players.guest = new Player("Guest");    },    // 计分    played: function () {        var players = this.players,            score = {                Home: players.home.point,                Guest: players.guest.point            };        scoreboard.update(score);    },    // 游戏开始    keypress: function (e) {        e = e || window.event;        if (e.which === 49) { // 按键1            mediator.players.home.play();            return;        }         if (e.which === 48) {            mediator.players.guest.play();            return;        }    }};// 运行游戏mediator.setup();window.onkeypress = mediator.keypress;// 游戏在30秒内结束setTimeout(function () {    window.onkeypress = null;    alert("Game Over!");}, 30000);