li>
  <a href="/introduction/type_comparison/">类型比较</a></li>
</ul>
</li>
</ul>
<hr>
<ul>
<li><strong>4. 协程与通道</strong>
<ul>
<li>
  <a href="/introduction/goroutine/">goroutine</a></li>
<li>
  <a href="/introduction/channel/">非缓冲通道</a></li>
<li>
  <a href="/introduction/channel_buffer/">缓冲通道</a></li>
<li>
  <a href="/introduction/channel_close/">关闭通道</a></li>
<li>
  <a href="/introduction/channel_direction/">通道方向</a></li>
<li>
  <a href="/introduction/chann