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From: Mikael Djurfeldt <djurfeldt@nada.kth.se>
Cc: djurfeldt@nada.kth.se, guile-devel@gnu.org
Subject: Re: Shared arrays
Date: Thu, 28 Oct 2004 13:54:14 +0200	[thread overview]
Message-ID: <xy7d5z33vo9.fsf@nada.kth.se> (raw)
In-Reply-To: <ljr7njt65u.fsf@troy.dt.e-technik.uni-dortmund.de> (Marius Vollmer's message of "Thu, 28 Oct 2004 13:48:29 +0200")

Marius Vollmer <marius.vollmer@uni-dortmund.de> writes:

> What worries me a bit right now is that one-dimensional shared
> arrays look like (uniform) vectors, but you can't use them in all
> the places that you can use (uniform) vectors.
>
> For example (excuse the density):
>
>   (vector? (make-shared-array (make-array 1 3 3) (lambda (i) (list i i)) 3))
>   => #f
>
> although one can of course argue that the diagonal of a 2-d array is a
> vector.

Yes,

I think it's ugly to have two alternative representations for a
1-dimensional list of numbers (uniform vector + 1D uniform array).
Just as we convert bignums small enough to fit in an inum, we should,
in my opinion, only use the uniform vector representation.

Or, perhaps even simpler, represent uniform vectors as 1D arrays.

M


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  reply	other threads:[~2004-10-28 11:54 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-10-28  9:31 Shared arrays Mikael Djurfeldt
2004-10-28 11:48 ` Marius Vollmer
2004-10-28 11:54   ` Mikael Djurfeldt [this message]
2004-10-28 12:15     ` Marius Vollmer
2004-10-30 14:38 ` Neil Jerram

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