Janek, et al --
...and then Janek Schleicher said...
%
% David T-G wrote at Wed, 12 Jun 2002 21:50:12 +0200:
%
% > % I would try to write it as
% > % while (<>) {
% > % my ($artist, $album, $track) = split m:/:;
% > % if ($track eq $foo) { # $foo eq "$foo" :-)
% > % ...
% > % }
% > % }
% >
% > I don't see a difference here except that you're using a variable $foo where I
threw in a constant
...
%
% The main difference is the position of my.
% You set it out of the loop while it is here in the loop.Ahhh... Right; I did, indeed, miss that before. % That's why $artist, $album and $track is undefined % at the beginning of every loop again. So it is. That brings up an older question which can be restated more clearly now: is it better to have a "my" definition tightly inside a loop but thus force looping through checking [at least] two other variables instead of simply checking to see if either has changed and only looping when necessary? In my case, I currently check to see if the source has changed and, if so, then kick off a new round of source checking and path depth checking and the like; if it were undefined every time, then I wouldn't be optimizing away those loops for some 90% of the run. % % (I also changed a little bit the regex from /\/// to m:/: what % I assume to be more readable, but that isn't very important % ) Well, readable is good, too, even in perl :-) % % $foo was anything I didn't care much, Right. % but "$foo" eq $foo is always right % and it's simpler to read, write and even quicker Hmmm... I don't follow you here, either. Do you mean that the quoted on the left compared to the unquoted on the right or is there a particular reason you've compared $foo to itself? % % > Interesting. One more reason not to know java, I guess ;-) <ducks> % % As alread Lenin said: % You have to be an expert of the language of your enemies :-) % (free translated from german: "Du musst die Sprache des Feindes beherrschen") Heh :-) Good point. % % > Hey, I could just undef *everything* between iterations and then I'd have a higher probability of % > finding one, eh? :-) % % One, you didn't want it :-) % You'll understand it when you'll understand the philosophy of my/our/local I guess I'll have to work on that, then, because the undef and re-search problem above seems the wrong way to do it. % ... % > Interesting... I just went to look for it in my 2e Camel book and can't find it (only my and % > local). Hmmm... % % Take a look to the "Art of Computer Programming" by Donald Knuth. % Nothing similar to Perl, but to Programming in general (without 'OOP'). I'm quite familiar with it, though not as freshly as when it was my course textbook. % % > I imagine and I can't wait :-) I need to really "get" OOP, too. % % If there's anybody who needs it hardcore, % take a look to Modula-3 (again without OOP). Ick. I didn't like Modula-2 (and part of the reason to avoid Python is because it depends on indentation for structure); I'd hate to see Modula-3! % % For OOP take a look to Damian Conway's books. Ahhh... A lead I can follow; thanks. % % % Cheerio, % Janek Aside from the loop semantics question above, which is only barely there, we may be drifting off topic... It's sufficient for me to go away and read for a while, though I'd still be very much interested in further pointers from those who wish to send them! Thanks & HAND :-D -- David T-G * It's easier to fight for one's principles (play) [EMAIL PROTECTED] * than to live up to them. -- fortune cookie (work) [EMAIL PROTECTED] http://www.justpickone.org/davidtg/ Shpx gur Pbzzhavpngvbaf Qrprapl Npg!
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