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From: | Eric Abrahamsen |
Subject: | bug#34708: alist-get has unclear documentation |
Date: | Mon, 04 Mar 2019 08:24:14 -0800 |
User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
On 03/03/19 07:51 AM, Drew Adams wrote: [...] > It's important to not give the impression that > there must be an _existing_ element with KEY. > Showing an example can help dispel that mistake. > > (setq foo ()) > (setf (alist-get 'a foo) 1 > (alist-get 'b foo) 2) > > C-h v foo; ==> ((b. 2) (a. 1)) I think it would be nice to have an example that shows both a common use-case (as an accumulator), and how to use REMOVE. I started off with the accumulator part: (let (word word-freq) (while (setq word (pop word-list)) (cl-incf (alist-get word word-freq 0 #'equal) 1))) But so far haven't come up with a non-contrived way to work REMOVE in there...
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