reorg code

1 files changed, 0 insertions, 102 deletions

diff --git a/advent-of-code/2023/03/2.rkt b/advent-of-code/2023/03/2.rkt
deleted file mode 100644
index 71c3221..0000000
--- a/advent-of-code/2023/03/2.rkt
+++ /dev/null
@@ -1,102 +0,0 @@
-#lang racket
-
-(require "../../lib/utils.rkt")
-(require "../../lib/obj.rkt")
-
-(define (read-input)
-  (call-with-input-file "input"
-    (λ (fp)
-      (list->vector (get-lines fp)))))
-
-(define schema (read-input))
-
-(define (char-at line col)
-  (string-ref (vector-ref schema line) col))
-
-(define height (vector-length schema))
-(define width (string-length (vector-ref schema 0)))
-
-(define make-num (obj-maker 'line 'col 'value 'length))
-
-(define (scan-nums)
-  (define nums '())
-  (let loop ((i 0))
-    (if (>= i height)
-        (void)
-        (let ()
-          (let loop ((j 0))
-            (define curline (vector-ref schema i))
-            (if (>= j width)
-                (void)
-                (let ()
-                  (define next 1)
-                  (define (find-next)
-                    (if (or (>= (+ j next) 140)
-                            (not (char-numeric? (char-at i (+ j next)))))
-                        (void)
-                        (let ()
-                          (set! next (+ 1 next))
-                          (find-next))))
-                  (if (char-numeric? (char-at i j))
-                      (let ()
-                        (find-next)
-                        (define value (string->number (substring curline j (+ j next))))
-                        (set! nums (cons (make-num i j value next) nums)))
-                      (void))
-                  (loop (+ j next)))))
-          (loop (+ 1 i)))))
-  (reverse nums))
-(define nums (scan-nums))
-
-(define (collect-adjacent-positions num)
-  (define (position-range line start end)
-    (define delta (- end start))
-    (map list (repeat delta line) (range start end)))
-  (define left
-    (if (= 0 (num 'col))
-        '()
-        (list (list (num 'line) (- (num 'col) 1)))))
-  (define right
-    (if (= width (+ (num 'col) (num 'length)))
-        '()
-        (list (list (num 'line) (+ (num 'col) (num 'length))))))
-  (define up
-    (if (= 0 (num 'line))
-        '()
-        (position-range (- (num 'line) 1)
-                        (max 0 (- (num 'col) 1))
-                        (min width (+ (num 'col) (num 'length) 1)))))
-  (define down
-    (if (= (- height 1) (num 'line))
-        '()
-        (position-range (+ (num 'line) 1)
-                        (max 0 (- (num 'col) 1))
-                        (min width (+ (num 'col) (num 'length) 1)))))
-  (append left right up down))
-
-(define asterisks (make-hash))
-
-(define (mark-adj-asterisk num)
-  (define adjs (collect-adjacent-positions num))
-  (define (mark coord)
-    (if (not (char=? #\* (char-at (car coord) (cadr coord))))
-        (void)
-        (let ()
-          (when (not (hash-has-key? asterisks coord))
-            (hash-set! asterisks coord '()))
-          (hash-set! asterisks coord (cons (num 'value) (hash-ref asterisks coord))))))
-  (for-each mark adjs))
-
-(for-each mark-adj-asterisk nums)
-
-(define aster-list (hash->list asterisks))
-
-(define (is-gear? aster)
-  (define nums-list (cdr aster))
-  (= 2 (length nums-list)))
-
-(define (power aster)
-  (define nums-list (cdr aster))
-  (* (car nums-list) (cadr nums-list)))
-
-(apply + (map power (filter is-gear? aster-list)))