From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Nicolas Petton <petton.nicolas@gmail.com>
Cc: Emacs development discussions <emacs-devel@gnu.org>
Subject: Re: Including some functions from dash.el in Emacs?
Date: Wed, 29 Oct 2014 08:50:59 -0400 [thread overview]
Message-ID: <jwvd29b9hjg.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <87wq7j72wz.fsf@gmail.com> (Nicolas Petton's message of "Wed, 29 Oct 2014 08:25:48 +0100")
> think it would be great if Elisp had them builtin, like `flatten`,
> `filter` or `reduce`.
IIUC, `filter' is covered by `cl-remove-if`, and `reduce' is called
`cl-reduce', right?
As for `flatten', all the examples I've seen where it's used have been
either cases where I think that using a different structure would have
made simpler&clearer code (and removed the need for `flatten'), or where
you really really got lucky.
If you think about types, flatten can't make sense for lists (since
lists are typically "lists of <something>" but not "list of list of list
of list of list ..."), so it is only really useful for trees where it
gives you the in-order elements of the tree, so it only works for trees
with no extra meta info. In those tree cases, I believe that
a tree-traversal-iterator would be more useful.
> Would it make sense to include some of the dash.el functions into Emacs?
I'm in the process of trying to get dash.el included in GNU ELPA.
I haven't decided yet whether or when it should go into Emacs or stay
in GNU ELPA.
Stefan
next prev parent reply other threads:[~2014-10-29 12:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-29 7:25 Including some functions from dash.el in Emacs? Nicolas Petton
2014-10-29 12:50 ` Stefan Monnier [this message]
2014-10-29 13:04 ` Rasmus
2014-10-29 13:16 ` Nicolas Petton
2014-10-29 14:06 ` Stefan Monnier
2014-10-29 14:52 ` Nicolas Petton
2014-10-29 16:35 ` Stefan Monnier
2014-10-30 9:24 ` Nicolas Petton
2014-10-30 13:41 ` Stefan Monnier
2014-10-29 14:09 ` raman
2014-10-29 16:36 ` Stefan Monnier
2014-10-30 14:38 ` raman
2014-10-30 15:48 ` Compiling non-Elisp files in ELPA packages (was: Including some functions from dash.el in Emacs?) Stefan Monnier
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