07/12/21 18:42:02
>>772
Gaucheで動くと思うけどなぁ？
(define (assoc key alist)
(and alist
(let loop ((ls alist))
(if (equal? key (caar ls))
(car ls)
(loop (cdr ls))))))
;-----------------------------------------------------------------
(define pref-alist
'(("山梨県" . "甲府市")
("神奈川県" . "横浜市")
("愛知県" . "名古屋市")
("茨城県" . "水戸市")))
;-----------------------------------------------------------------
(assoc "山梨県" pref-alist)