RE: DSSSL side effect-freeness

Subject: RE: DSSSL side effect-freeness
From: Paul Prescod <papresco@xxxxxxxxxxxxxxxx>
Date: Wed, 28 Jan 1998 17:19:15 -0500 (EST)
On Wed, 28 Jan 1998, Frank A. Christoph wrote:
> So this is an argument for side effect-freeness?  OK, I see your point about
> being able to apply only part of the style spec.  I don't see what this has
> to do with the grove being distributed, though -- and I can't imagine
> distributed groves being a typical case anyway.

Distributedness just makes the grove seem bigger. :) :) Seriously, I 
wanted to emphasize not only the size, but the bandwidth requirements of 
applying the whole stylesheet to the whole grove. The DSSSL way requires 
a few cross-machine queries, but very little actual data will typically 
cross the net.

> So, assuming we've ruled out side effects, what is the argument against
> laziness?


1. Implementation simplicity.
2. Scheme compatibility.
3. Leaves open the door for side-effectful supersets (like Jade!) (debug ). 
4. It's what most programmers expect anyhow -- few of us get to use lazy 
languages so most don't "know what they are missing." For instance I had 
to think hard to come up with a situation where a lazy language would be 
better because I am so used to thinking in terms of eager ones. Most of 
the examples of lazy programming I see are counters and other things that 
I don't use much day-to-day or else that I automatically wrap in a lambda 
without thinking about it...

 Paul Prescod

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  • Re: DSSSL side effect-freeness, (continued)
        • Paul Prescod - from mail1.ability.netby (8.8.5/8.6.12) with ESMTP id TAA10715Tue, 27 Jan 1998 19:42:59 -0500 (EST)
    • Paul Prescod - from mail1.ability.netby (8.8.5/8.6.12) with ESMTP id TAA10659Tue, 27 Jan 1998 19:42:27 -0500 (EST)
    • Frank A. Christoph - from mail1.ability.netby (8.8.5/8.6.12) with ESMTP id AAA12305Wed, 28 Jan 1998 00:06:25 -0500 (EST)
      • Pierre Mai - from mail1.ability.netby (8.8.5/8.6.12) with ESMTP id OAA22416Wed, 28 Jan 1998 14:15:53 -0500 (EST)
      • Paul Prescod - from mail1.ability.netby (8.8.5/8.6.12) with ESMTP id RAA24174Wed, 28 Jan 1998 17:19:24 -0500 (EST) <=
    • W. Eliot Kimber - from mail1.ability.netby (8.8.5/8.6.12) with ESMTP id OAA23003Wed, 28 Jan 1998 14:56:26 -0500 (EST)