你遇到过的源代码中最好的注释是什么?
当前回答
不是注释,而是属性
[ThereBeDragons]
还有一个是我在IHttpHandler的实现中看到的
//What is this?
public bool IsReusable
{
get{return false;}
}
其他回答
Re eating one's own dogfood: We have the same term in our workplace (granted, only because I introduced it). My code is peppered with comments that say "TODO" and indicate something that ought to be done eventually, but a comment saying "DOGFOOD" (both keywords are always at the beginning of the comment, in all caps) means something that must be done before this program can be used even internally. It's a handy thing to search for, as the word "dogfood" is never going to appear in a quoted string - if it does, I can always just say "dog-food" or something - so even a case-insensitive search will come up with the right results.
Regarding zeroing the accumulator: I've done exactly the same thing when programming an Intel 80x86 (I started on the 8086 and moved up from there into the modern Pentiums). XORing a register with itself is the quickest and tightest way to clear it. Using "MOV AX,0" requires three bytes (opcode and two bytes of literal 16-bit zero), whereas "XOR AX,AX" is only two; it's even more noticeable with the 386-and-higher extended registers, where "MOV EAX,0" requires five bytes (four bytes of 32-bit zero). My C/C++ compiler always zeroes registers this way, so I'd assume it's still the best way (although I haven't studied opcode timing tables in ages, and probably both XOR reg,reg and MOV reg,imm take one clock).
在linux 1.0内核调度器(schedule .c)中:
Dijkstra可能讨厌我。
/*
* 'schedule()' is the scheduler function. It's a very simple and nice
* scheduler: it's not perfect, but certainly works for most things.
* The one thing you might take a look at is the signal-handler code here.
*
* NOTE!! Task 0 is the 'idle' task, which gets called when no other
* tasks can run. It can not be killed, and it cannot sleep. The 'state'
* information in task[0] is never used.
*
* The "confuse_gcc" goto is used only to get better assembly code..
* Dijkstra probably hates me.
*/
asmlinkage void schedule(void)
(…)
//Woulda
if(x) {}
//Shoulda
else if(y) {}
//Coulda
else {}
* ...and don't just declare it volatile and think you've solved
* the problem. You young punks think you know what volatile
* means... why in my day we had to cast it volatile uphill
* both ways, and the code still didn't work! Whippersnappers...
这是我们团队微观管理效果的一个活生生的例子:
// I am not responsible of this code.
// They made me write it, against my will.
... 我们敬爱的技术总监很喜欢把代码和编码指南都硬塞到开发人员的喉咙里(*)。
当然,当项目负责人寻找bug的原因时,发现它在“非最佳代码”中,他就不那么高兴了……
(*)当然,我指的是强大的VB国王……如果你想评估强大的VB国王的全部力量,你可以阅读下面的SO帖子:你被迫遵循的最奇怪的编码标准规则是什么?...
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