Re: Elisp threading macros

[Garklein <garklein97@gmail.com>]

> And now we have no idea of what this code does, not speaking of the
> diverse ->, --> etc... that are a mystery.

To me, the `-some->' form is clearer than the `let'. (I am very happy
to learn about `when-let' though, useful!) I can easily read it left
to right, as if it were English and not code.

I don't see what's so bad about the names `->', `-->' etc. After all,
we commonly use functions with such cryptic names as `car', `cdr', and
`cons'  :)

On Wed, Aug 28, 2024 at 2:25 PM Thierry Volpiatto <thievol@posteo.net> wrote:
>
> Garklein <garklein97@gmail.com> writes:
>
> > Hello,
> >
> > Would it be possible to have the dash.el macros `->', `->>', `-->',
> > and `-some->' in subr-x.el? I find them to be really useful, and would
> > love to see them in the base language.
>
> Personally, I have stopped using packages wrote with dash.el, the code is
> unreadable, at least for me.
> I hope we will not have to suffer of this in Emacs.
>
> > I know that `thread-first' and `thread-last' exist, but I find that my
> > eyes can recognize `->' and `->>' much easier. `-->' is really nice
> > for more complex threading.
> >
> > `-some->' is useful in cases like this:
> >
> > (let (foo (function-which-may-return-nil))
> >   (when foo
> >     (bar foo)))
> >
> > which can be rewritten, much cleaner, as
> >
> > (-some-> foo function-which-may-return-nil bar)
>
> And now we have no idea of what this code does, not speaking of the
> diverse ->, --> etc... that are a mystery.
>
> --
> Thierry