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Re: Is readdir ever deterministic?

by ncw (Friar)
on Sep 17, 2001 at 23:22 UTC ( #112934=note: print w/replies, xml ) Need Help??


in reply to Is readdir ever deterministic?

Does there exist a platform where readdir returns . and .. in other than the first two return values?

Hmm, good question! If any filing system would do this it would be reiserfs under linux. Reiserfs uses a hashed directory structure rather than the linear directory structure as used by most other fs. Reiser returns directory entries in hash order (a familiar concept to perl programmers!).

I just tried it and the answer is reiserfs always puts "." and ".." first! The hash order isn't as random as a perl hash either which is interesting too.

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[james28909]: omg
[james28909]: im just finding out that july and august have 31 days?
[atcroft]: stevieb: Apparently it was contagious....
[atcroft]: james28909: Make both hands into fists, place them together (with thumbs concealed), and every knuckle is a month (starting with Jan.) has 31 days, every dip (between knuckles) does not....
[atcroft]: (And Feb. is the odd case, because it is 28, unless it is a year divisible by 4, or if it is divisible by both 100 and 400 (at which point it is 29).)
[james28909]: i know but scroll through your calendar on your computer.
[james28909]: i thiught you were going to say make both hands into a fist and puch yourself in the face
[atcroft]: .oO(Sorry, I probably should have said take two normal hands....)
[atcroft]: james28909: No, unless you are a politician, I wouldn't say that (and even if you are, I still probably wouldn't say that).
[james28909]: i mean how hard can it be? its just subtracting days lol

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