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devel / comp.lang.prolog / Re: 50 Years of Prolog Nonsense

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o 50 Years of Prolog NonsenseMostowski Collapse

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Re: 50 Years of Prolog Nonsense

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Subject: Re: 50 Years of Prolog Nonsense
From: burse...@gmail.com (Mostowski Collapse)
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 by: Mostowski Collapse - Sun, 17 Apr 2022 12:10 UTC

Here is a challenge. From SWI-Prolog I am used to:

?- atomic_list_concat([a,b,c],',',A).
A = 'a,b,c'.
?- use_module(library(dialect/ifprolog)).
true.

?- atom_split(A, ',', [a,b,c]).
A = 'a,b,c'.

Something similar available for Scryer Prolog? These predicates
offer the opportunity for some O(n) implementation, compared
to a naive Prolog bootstrapping with atom_concat/3 which is O(n^2).

This holds for the modes atom_split(-, +, +) and atomic_list_concat(+, +, -).
The other mode I am not exactly sure whether there is really an opportunity.
The predicate mode atom_split(-, +, +) also brings back to Prolog

the join() idiom, widely discussed in JavaScript and Python places.

Mostowski Collapse schrieb am Sonntag, 17. April 2022 um 02:30:23 UTC+2:
> Oh my dear, Scryer Prolog lost the battle with its
> char lists = strings idea and his preference for chars APIs.
> I don't have a single chars API in Dogelog Player, was
>
> fully betting on codes only, makes life much easier.
> Now this here. BTW: A library charsio does not anymore
> exist in SICStus Prolog 4.7.1:
>
> | :- use_module(library(charsio)).
> ! Existence error in argument 1 of use_module/1
> ! file library(charsio) does not exist
> ! goal: use_module(user:library(charsio))
>
> Oh the irony, I did find a library codesio:
>
> | ?- use_module(library(codesio)).
> % loading d:/software/logic/sics/library/codesio.po...
> % module codesio imported into user
> % loading d:/software/logic/sics/library/types.po...
> % module types imported into codesio
> % loaded d:/software/logic/sics/library/types.po in module types, 0 msec 6432 bytes
> % loading foreign resource d:/software/logic/sics/library/x86_64-win32-nt-4/codesio.dll in module codesio
> % loaded d:/software/logic/sics/library/codesio.po in module codesio, 0 msec 64768 bytes
> yes
> | ?- read_from_codes("X+Y.", T).
> T = _A+_B ?
>
> LoL


devel / comp.lang.prolog / Re: 50 Years of Prolog Nonsense

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