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Re: master d62766305a: Add `take` and `ntake` (bug#56521)

From: Sam Steingold
Subject: Re: master d62766305a: Add `take` and `ntake` (bug#56521)
Date: Mon, 18 Jul 2022 18:57:04 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (darwin)

> * Philip Kaludercic <cuvyvcx@cbfgrb.arg> [2022-07-18 18:56:24 +0000]:
> Sam Steingold <sds@gnu.org> writes:
>>> * Mattias Engdegård <znggvnfr@npz.bet> [2022-07-17 11:47:25 -0400]:
>>> branch: master
>>> commit d62766305ad8fe6ca1695341c34b9836d051e3cb
>>> Author: Mattias Engdegård <mattiase@acm.org>
>>> Commit: Mattias Engdegård <mattiase@acm.org>
>>>     Add `take` and `ntake` (bug#56521)
>>>     These are useful list primitives, complementary to `nthcdr`.
>> How are these better than the venerable butlast and nbutlast?
>> https://www.gnu.org/software/emacs/manual/html_node/elisp/List-Elements.html#index-butlast
>> note that butlast and nbutlast have a very long Lisp history, they
>> appear also in Common Lisp and many lisps before that.
> The immediate advantage I recognise is that you don't need to determine
> the length of the list if you are actually just interested in the first
> n, not just not-interested in the last m.

good point, thank you!

in that case you might consider modifying (n)butlast to
call (n)take to make them faster.

Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.2113
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