From: Bart Schaefer <schaefer@brasslantern.com>
To: Zsh Users <zsh-users@sunsite.dk>
Subject: Re: Sorting file names randomly
Date: Mon, 19 Nov 2007 00:57:18 -0800 [thread overview]
Message-ID: <071119005718.ZM4162@torch.brasslantern.com> (raw)
In-Reply-To: <20071119042136.GA11967@scowler.net>
On Nov 18, 11:21pm, Clint Adams wrote:
} Subject: Re: Sorting file names randomly
}
} On Sun, Jul 24, 2005 at 06:44:15AM +0000, Bart Schaefer wrote:
} > for ((i=1; i <= $#; ++i)) { h[$i.$RANDOM]=$argv[i] }
}
} Is there any chance that prepending "$i." and hashing it will
} decrease the randomness of the shuffle significantly?
I no longer remember why I didn't just use h[$RANDOM] -- it may have
been a typo. Looking back at the part of my message that you trimmed,
I said:
: The local RANDOM is there to force it to be zero-padded to 5 places,
: so all the hash keys are the same length; probably not essential.
But $i is not padded, so if that's prepended the hash keys aren't all
the same length any more, which is why I wonder whether it's meant to
be there at all.
However, I suspect the randomness might be reduced for large numbers
of arguments whether or not $i is prepended, because within each hash
bucket the values are in a list in the order they were added to that
bucket.
next prev parent reply other threads:[~2007-11-19 8:57 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-23 19:42 DervishD
2005-07-23 21:26 ` DervishD
2005-07-24 6:44 ` Bart Schaefer
2005-07-24 7:39 ` DervishD
2005-07-24 8:37 ` DervishD
2005-07-24 8:40 ` DervishD
2005-07-24 10:32 ` Bart Schaefer
2005-07-25 6:47 ` Bart Schaefer
2005-07-25 13:15 ` DervishD
2005-07-25 13:27 ` DervishD
2005-07-25 17:46 ` Bart Schaefer
2005-07-25 18:10 ` DervishD
2007-11-19 4:21 ` Clint Adams
2007-11-19 8:57 ` Bart Schaefer [this message]
2007-11-19 9:08 ` Bart Schaefer
2007-11-19 11:44 ` Clint Adams
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