storyxc
2023-07-07 19:02:21 +08:00
linus 在 TED 的一期节目里说了他自己认为有品味的代码：
```
remove_list_entry(entry)
{
// The "indirect" pointer points to the
// *address* of the thing we'll update
indirect = &head;
// Walk the list, looking for the thing that
// points to the entry we want to remove
while ((*indirect) != entry)) {
indirect = &(*indirect)->next;
}
// .. and just remove it
*indirect = entry->next;
}
```
与之相反，不够 good taste 的代码
```
remove_list_entry(entry)
{
prev = NULL;
walk = head;
// Walk the list
while (walk != entry) {
prev = walk;
walk = walk->next;
}
// Remove the entry by updating the
// head or the previous entry
if(!prev) {
head = entry->next;
} else {
prev->next = entry->next;
}
}
```