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Re: Writing a procedure in different style

From: tomas
Subject: Re: Writing a procedure in different style
Date: Mon, 21 Dec 2020 13:31:48 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

On Sun, Dec 20, 2020 at 06:57:34PM +0100, Zelphir Kaltstahl wrote:
> Hello Tomas!
> I think you are right about it only being down one stack frame down. The
> checks are performed on what contains the next thing which is recurred on.

Nice explanation :)

> For a moment I thought "But isn't the null? check done twice in the
> first cond part?" [...]

This is one of the fantastic (and scary) things I often experience
in this (scheme-y) context (take SICP, or the Little Schemer).

Everything looks so easy, but whenever I try myself, I realise that
I've been taken along a path along high mountains, with breathtaking
views, and down there it gets messy and there are crocodiles.

It takes a long time to massage one's messy, lowly programs into a
form which approaches that deep beauty.

But it's fun :)

 - t

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