[理想的设计特征](%E8%BD%AF%E4%BB%B6%E6%9E%84%E9%80%A0%E4%B8%AD%E7%9A%84%E8%AE%BE%E8%AE%A1/%E7%90%86%E6%83%B3%E7%9A%84%E8%AE%BE%E8%AE%A1%E7%89%B9%E5%BE%81.md) [设计的层次](%E8%BD%AF%E4%BB%B6%E6%9E%84%E9%80%A0%E4%B8%AD%E7%9A%84%E8%AE%BE%E8%AE%A1/%E8%AE%BE%E8%AE%A1%E7%9A%84%E5%B1%82%E6%AC%A1.md) [常见设计模式](%E8%BD%AF%E4%BB%B6%E6%9E%84%E9%80%A0%E4%B8%AD%E7%9A%84%E8%AE%BE%E8%AE%A1/%E5%B8%B8%E8%A7%81%E8%AE%BE%E8%AE%A1%E6%A8%A1%E5%BC%8F.md)