double penetration; // ouch

最近在我们的代码中发现了这一点(我们开发企业软件):

// Instance of excel
Excel excel = this.CreateExcelInstance();
excel.Open(stream); // how to close it?!

在此之前，我确信我们已经摆脱了这些“有趣的东西”，我们正在以正确的、意识形态正确的方式做这件事……

我想我有过这样的经历:

if (case1) { // trivial
...
}
else { // we are screwed
 /* fill in later */
}

好吧，我可能用了一个比搞砸更强烈的词

我最喜欢的评论是:

//the XML returned from this request is *mind-bogglingly* bad. Terrifyingly bad.
//a completed batch looks like this:
//<Batch>batchid=363777811 status=Done dateandtime=09/18/2007 09:53:10 PDT activateditems=335 numberofwarnings=0 itemsnotacivated=17 </Batch>
//and an incomplete batch like:
//<Batch>batchid=363778361 status=In Progress </Batch>
//so we'll just parse each item as a regex. Thanks Amazon.

Amazon实际上是这样返回XML的。

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).

我没有这个来源的副本，但我一直记得它:

//如果你想不明白，就不要读这篇文章