[一、昨日回顾](%E4%B8%80%E3%80%81%E6%98%A8%E6%97%A5%E5%9B%9E%E9%A1%BE9.md) [二、今日目标](%E4%BA%8C%E3%80%81%E4%BB%8A%E6%97%A5%E7%9B%AE%E6%A0%879.md) [三、Object](%E4%B8%89%E3%80%81Object.md) [四、继承](%E5%9B%9B%E3%80%81%E7%BB%A7%E6%89%BF.md) [五、this指向总结](%E4%BA%94%E3%80%81this%E6%8C%87%E5%90%91%E6%80%BB%E7%BB%93.md) [六、案例（贪吃蛇）](%E5%85%AD%E3%80%81%E6%A1%88%E4%BE%8B%EF%BC%88%E8%B4%AA%E5%90%83%E8%9B%87%EF%BC%89.md)