我在 Perl 中看过一些可怕的代码，但是我对这个毫无头绪：
select((select(s),$|=1)[0])
这是我们用于与服务器通信的某些网络代码，我认为它与缓冲有关（因为它设置了$ | ）。
但我不明白为什么有多个select调用或数组引用。有人可以帮助我吗？
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