bug#32841: assoc-set fails with dot notation association list
"???п?" via "Bug reports for GUILE, GNU's Ubiquitous Extension Language" <[email protected]> Mon, 21 Oct 2024 16:54:54 +0800
| Newsgroups | gmane.lisp.guile.bugs |
|---|---|
| Message-ID | <[email protected]> |
The thread and all replies were in 2018. Six years later, in 2024, Anyone opening the up-to-date online manual still sees the old bad code there! The manual is not adjusted even though previous emails had pointed the cause and solution out!
Today, the page has a valid link of https://www.gnu.org/software/guile/manual/html_node/Alist-Example.html and still contains
6.6.20.6 Alist Example
Here is a longer example of how alists may be used in practice.
(define capitals '(("New York" . "Albany") ("Oregon" . "Salem") ("Florida" . "Miami"))) ;; What's the capital of Oregon? (assoc "Oregon" capitals) ⇒ ("Oregon" . "Salem") (assoc-ref capitals "Oregon") ⇒ "Salem" ;; We left out South Dakota. (set! capitals (assoc-set! capitals "South Dakota" "Pierre")) capitals ⇒ (("South Dakota" . "Pierre") ("New York" . "Albany") ("Oregon" . "Salem") ("Florida" . "Miami")) ;; And we got Florida wrong. (set! capitals (assoc-set! capitals "Florida" "Tallahassee")) capitals ⇒ (("South Dakota" . "Pierre") ("New York" . "Albany") ("Oregon" . "Salem") ("Florida" . "Tallahassee")) ;; After Oregon secedes, we can remove it. (set! capitals (assoc-remove! capitals "Oregon")) capitals ⇒ (("South Dakota" . "Pierre") ("New York" . "Albany") ("Florida" . "Tallahassee"))
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