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).

我告诉学员至少做一些异常处理。这是我在每一个db调用....返回

Catch (Exception e) {
    //eat it
}

/*

 ____________________
/                    \
| Jean-Michel Bechet |
| 2002-2009          |
\___  _______________/
    |/
 (o_
 //\
 V_/_


*/

在一个巨大的800行'switch'语句中，在中间的某处:

// Joe is sorry

几百行之后……

// Harry is sorry too

这张图片来自图片浏览器Xee。

    // At this point, I'd like to take a moment to speak to you about the Adobe PSD format.
    // PSD is not a good format. PSD is not even a bad format. Calling it such would be an
    // insult to other bad formats, such as PCX or JPEG. No, PSD is an abysmal format. Having
    // worked on this code for several weeks now, my hate for PSD has grown to a raging fire
    // that burns with the fierce passion of a million suns.
    // If there are two different ways of doing something, PSD will do both, in different
    // places. It will then make up three more ways no sane human would think of, and do those
    // too. PSD makes inconsistency an art form. Why, for instance, did it suddenly decide
    // that *these* particular chunks should be aligned to four bytes, and that this alignement
    // should *not* be included in the size? Other chunks in other places are either unaligned,
    // or aligned with the alignment included in the size. Here, though, it is not included.
    // Either one of these three behaviours would be fine. A sane format would pick one. PSD,
    // of course, uses all three, and more.
    // Trying to get data out of a PSD file is like trying to find something in the attic of
    // your eccentric old uncle who died in a freak freshwater shark attack on his 58th
    // birthday. That last detail may not be important for the purposes of the simile, but
    // at this point I am spending a lot of time imagining amusing fates for the people
    // responsible for this Rube Goldberg of a file format.
    // Earlier, I tried to get a hold of the latest specs for the PSD file format. To do this,
    // I had to apply to them for permission to apply to them to have them consider sending
    // me this sacred tome. This would have involved faxing them a copy of some document or
    // other, probably signed in blood. I can only imagine that they make this process so
    // difficult because they are intensely ashamed of having created this abomination. I
    // was naturally not gullible enough to go through with this procedure, but if I had done
    // so, I would have printed out every single page of the spec, and set them all on fire.
    // Were it within my power, I would gather every single copy of those specs, and launch
    // them on a spaceship directly into the sun.
    //
    // PSD is not my favourite file format.

DataRow[] foundrows = FilterCalendarEntriesBecauseDotNETIsFuckedUp(tbtemp,CalDate);

不是注释，而是一个有趣的函数名