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Re: Lisp Live buffer
From: |
Emanuel Berg |
Subject: |
Re: Lisp Live buffer |
Date: |
Mon, 26 Dec 2022 21:26:12 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) |
> (setq ttt-board
> (list
> '(x o o)
> '(· x ·)
> '(· · x) ))
I have tried to do a MVC Elisp demo but the function 'world-set' is
incorrect, I still didn't get past that step. See below, it's line
32-38. The result is visible in the test function and it's
output, last.
What is needed is essentially a multidimensional array and then
getters and setters (based on indexes or coordinates) to operate
on that.
Ideas?
;;; -*- lexical-binding: t -*-
;;
;; this file:
;; https://dataswamp.org/~incal/emacs-init/mvc/model.el
(require 'cl-lib)
(defun make-world (dim len &optional init)
(or init (setq init "."))
(if (= dim 1)
(make-list len init)
(make-list len (make-world (1- dim) len init)) ))
(defun world-size (world)
(length (flatten-list world)) )
(defun make-world-test ()
(let ((tests (list (list "cell" (make-world 1 1) 1)
(list "ttt" (make-world 2 3) 9)
(list "chess" (make-world 2 8) 64)
(list "cube" (make-world 3 3) 27) )))
(cl-loop
for (name world expected) in tests
and num-tests from 0 do
(let ((size (world-size world)))
(unless (= size expected)
(error "World %s has size %s, expected %s" name size expected) ))
finally return (= num-tests (length tests)) )))
;; (make-world-test)
(defun world-set (world pos to)
(if (= 1 (length pos))
(setcar (nthcdr (car pos) world) to)
(setcar
(nthcdr (car pos) world)
(world-set (car (nthcdr (car pos) world)) (cdr pos) to) ))
world)
(defun world-set-test ()
(let ((ttt (make-world 2 3)) )
(world-set ttt '(0 1) "a") ))
;; (world-set-test) ; (("." "a" ".") ("." "a" ".") ("." "a" "."))
(provide 'model)
--
underground experts united
https://dataswamp.org/~incal
- Lisp Live buffer, Emanuel Berg, 2022/12/06
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