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<?php
/**
* Desc: 老师类V2
* Date: 2020-07-20
* Author: <tao.shi@ifchange.com>
*/
namespace DesignPatterns;
use Cassandra\Collection;
class TeacherV2
{
//命令班长统计班里有多少人
public function command(GroupLeaderV2 $groupLeader) {
//班长清点人数
$groupLeader->countStudentsV2();
}
}
//我们先看含义上半段, 不该有直接依赖关系的类之间,不要有依赖
//老师应该仅仅需要班长告诉班里有多少人就可以了
//但是现在在让班长清点班里人数的时候,老师还要创建学生的集合数据
//那么我们要如何修改,才能使其满足迪米特法则呢
//我们可以看teacherV2类
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