Browsed by
作者: Leo

Talk is cheap, show me the code——空谈误国,实干兴邦!
Linus:利用二级指针删除单向链表

Linus:利用二级指针删除单向链表

感谢网友full_of_bull投递此文(注:此文最初发表在这个这里,我对原文后半段修改了许多,并加入了插图)

Linus大婶在slashdot上回答一些编程爱好者的提问,其中一个人问他什么样的代码是他所喜好的,大婶表述了自己一些观点之后,举了一个指针的例子,解释了什么才是core low-level coding

下面是Linus的教学原文及翻译——

“At the opposite end of the spectrum, I actually wish more people understood the really core low-level kind of coding. Not big, complex stuff like the lockless name lookup, but simply good use of pointers-to-pointers etc. For example, I’ve seen too many people who delete a singly-linked list entry by keeping track of the “prev” entry, and then to delete the entry, doing something like。(在这段话的最后,我实际上希望更多的人了解什么是真正的核心底层代码。这并不像无锁文件名查询(注:可能是git源码里的设计)那样庞大、复杂,只是仅仅像诸如使用二级指针那样简单的技术。例如,我见过很多人在删除一个单项链表的时候,维护了一个”prev”表项指针,然后删除当前表项,就像这样)”

if (prev)
    prev->next = entry->next;
else
    list_head = entry->next;

and whenever I see code like that, I just go “This person doesn’t understand pointers”. And it’s sadly quite common.(当我看到这样的代码时,我就会想“这个人不了解指针”。令人难过的是这太常见了。)

阅读全文 Read More

好烂啊有点差凑合看看还不错很精彩 (57 人打了分,平均分: 4.25 )
Loading...