mailing-list for TeXmacs Users

[Frank <address@hidden>]

Hello,

I believe that implementing find procedure by hand is a better option.

> (define (find proc list)
>     (define (find-iter head)
>       (cond
>         ((null? head) #f)
>         ((proc (car head)) (car head))
>         (else (find-iter (cdr head)))))
>     (find-iter list))

The filter procedure costs asymptotically more time on average (and 
probably more space, depending on the implementation).

Best wishes,

Le 04/06/2019 à 23:19, Giovanni Piredda a écrit :
> I need to become acquainted with the different standards :-) (I 
> checked Guile without realizing that I was checking a different version).
>
> I used the filter function in place of it.
>
>
> G.
>
> On 04.06.19 23:06, Massimiliano Gubinelli wrote:
> > You expect the procedure find to be defined in Guile? I just checked 
> > and even from the REPL on the command line such function does not 
> > belong to Guile 1.8. Not all schemes implement the same language. In  
> > particular you cannot expect procedures which are not requested by 
> > the R5RS standard since Guile 1.8 is essentially based on that.
> > Best
> > Max
> >
> >
> > > On 4. Jun 2019, at 22:19, Giovanni Piredda <address@hidden> wrote:
> > >
> > >
> > > On 04.06.19 22:18, Giovanni Piredda wrote:
> > > > Dear all,
> > > >
> > > > did anyone ever used the find function in the Scheme implementation 
> > > > used in TeXmacs? It gives me a "Unbound variable: find" error. I 
> > > > can run the same code from emacs (using MIT-GNu Scheme).
> > > I mean the same code which is giving an error inside TeXmacs
--
Best wishes!
Yours,