Re: Getting substring

[Pierre Rouleau <prouleau001@gmail.com>]

Heime,

I think you need to learn a little bit of Emacs Lisp, or Lisp.  Read a book
on Lisp to get you going.   Asking questions like you do won't help you
much.  You first need to understand LIsp and the way it deals with
functions, the concepts.

LISPcraft from Robert Wilensky is old (1984) but small and it covers the
basics which apply to Emacs Lisp.    It's a nice read and the book is
relatively small.


On Wed, Aug 16, 2023 at 11:01 PM Heime <heimeborgia@protonmail.com> wrote:

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> Sent with Proton Mail secure email.
>
> ------- Original Message -------
> On Thursday, August 17th, 2023 at 2:52 PM, Heime <
> heimeborgia@protonmail.com> wrote:
>
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> >
> >
> >
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> >
> > Sent with Proton Mail secure email.
> >
> >
> > ------- Original Message -------
> > On Thursday, August 17th, 2023 at 2:33 PM, Pierre Rouleau
> prouleau001@gmail.com wrote:
> >
> >
> >
> > > I mean,
> > > Executing :
> > >
> > > > (setq str "bigoplus ⨁︁")
> > > > (message "%s TEST: " (car (split-string str)))
> > >
> > > prints bigoplus.
> > >
> > > but
> > >
> > > (message "%s TEST: " (car (split-string grafm)))
> > >
> > > will depend of what grafm holds.
> > >
> > > On Wed, Aug 16, 2023 at 10:30 PM Pierre Rouleau prouleau001@gmail.com
> > >
> > > wrote:
> > >
> > > > Why does the following not print the first word?
> > > >
> > > > > (message "%s TEST: " (car (split-string grafm)))
> > > >
> > > > Are you sure it does not print it? It prints bigoplus for me.
> > > > You can also look into the 'Message' buffer to see what was printed
> by
> > > > the message function. - Pierre
> >
> >
> > I now realise my mistake of putting "%s" before "TEST". I was thus doing
> things
> > correctly after all.
> >
> > The command (car (split-string grafm)) also works if there are no spaces
> in
> > 'grafm', it still returns the string as a first element in the list
> result.
>
> Have started to wonder whether the following is wrong to do
>
> (setq grafm "bigoplus ⨁︁")
> (pcase (car (split-string grafm))
>   "bigoplus" ("Detected bigoplus"))
>
> It is not a string.
>
>

-- 
/Pierre