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bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `
From: |
Michael Heerdegen |
Subject: |
bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `Calling Functions' |
Date: |
Sat, 28 Jun 2014 21:37:06 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.92 (gnu/linux) |
Eli Zaretskii <eliz@gnu.org> writes:
> > Say that
> >
> > (apply-partially f arg_1 ... arg_n)
> >
> > is equivalent to
> >
> > (lambda (&rest args) (apply f arg_1 ... arg_n args))
>
> Sorry, I don't see how this is an improvement.
It's an improvement because it's short and clearer than any text that
just tries to describe it.
> Accidentally, the current text is a bit different from what you cited:
I didn't cite anything, I just said that I don't find it clear, because
I think it can be misunderstood.
> > And I think that the paragraph about `apply-partially` should be merged
> > into the later text talking about functionals, because the main use case
> > of `apply-partially` is to construct anonymous functions for usage as
> > argument to some other function.
>
> If you mean this:
>
> It is common for Lisp functions to accept functions as arguments or
> find them in data structures (especially in hook variables and property
> lists) and call them using `funcall' or `apply'. Functions that accept
> function arguments are often called "functionals".
>
> Sometimes, when you call a functional, it is useful to supply a no-op
> function as the argument. Here are two different kinds of no-op
> function:
>
> then it directly follows the part we were talking about.
I were talking about both parts, and that we should say that
`apply-partially` is, like ignore and identity, as well mainly useful in
combination with functionals. That's all.
Eli, dunno why, but our discussions don't yield any results most of the
time. I would like to stop here, ok?
Michael.
- bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `Calling Functions', Michael Heerdegen, 2014/06/27
- bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `Calling Functions', Drew Adams, 2014/06/27
- bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `Calling Functions', Michael Heerdegen, 2014/06/28
- bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `Calling Functions', Eli Zaretskii, 2014/06/28
- bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `Calling Functions', Michael Heerdegen, 2014/06/28
- bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `Calling Functions', Eli Zaretskii, 2014/06/28
- bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `Calling Functions', Drew Adams, 2014/06/28
- bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `Calling Functions',
Michael Heerdegen <=
- bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `Calling Functions', Eli Zaretskii, 2014/06/29
- bug#17623: 24.4.50; incorrect example for `apply-partially' in (elisp) `Calling Functions', Stefan Monnier, 2014/06/29