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Re: lexicographic list comparison


From: Stefan Monnier
Subject: Re: lexicographic list comparison
Date: Mon, 12 Sep 2022 15:32:03 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux)

Sam Steingold [2022-09-12 14:41:47] wrote:
>> * Stefan Monnier <zbaavre@veb.hzbagerny.pn> [2022-09-12 14:31:33 -0400]:
>> [ Tho I suspect you'll want those comparison functions to return
>>   a -1/0/1 result rather than just a boolean, so you'd need an extra
>>   combinator to turn such a comparison function into the kind expected
>>   by `sort`.  ]
>
> The predicate argument to lisp sort returns a boolean.

Indeed, but `list-compare` will likely want the other kind, hence the
need for combinators that change from kind to the other.


        Stefan




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