christophejunke

(defpackage :advent.2019.10 (:use :cl :alexandria))
(in-package :advent.2019.10)

;; (setf *default-pathname-defaults* #P"~/data/advent/2019/")

;; day 10 - part 1

(defun map-map (fn stream &aux (y 0) (x 0))
  (flet ((callback () (funcall fn x y)))
    (loop 

christophejunke

(defpackage :advent.2019.03-alt (:use :cl :alexandria :cl-ppcre))
(in-package :advent.2019.03-alt)

(defstruct seg lo hi o d z)
(defstruct (hseg (:constructor hseg (lo hi o d z)) (:include seg)))
(defstruct (vseg (:constructor vseg (lo hi o d z)) (:include seg)))

(defun seg (type from to z)
  (funcall type
	   (min from to)

christophejunke

(in-package :advent.2019)

(defstruct (point (:conc-name) (:constructor point (x y))) x y)
(defstruct (segment (:conc-name)) from to)
(defstruct (hsegment (:constructor hsegment (from to)) (:include segment)))
(defstruct (vsegment (:constructor vsegment (from to)) (:include segment)))

(defun manhattan (p1 p2)
  (+ (abs (- (x p2) (x p1)))
     (abs (- (y p2) (y p1)))))

christophejunke

(defpackage :o (:use :cl :bricabrac.sdl2.event-loop :sdl2))
(in-package :o)

(defgeneric handle-event (state event type)
  (:method (state event type))
  (:method (state event (type (eql :quit)))
    (throw :quit :quit)))

(defun clock-ms ()
  (round (* (osicat:get-monotonic-time) 1000)))

christophejunke

(defpackage :ev (:use :cl :optima :alexandria))
(in-package :ev)

(defstruct (meta (:constructor meta (form))) form)

(defun alist/augment (env namespace key value)
  (acons namespace (acons key value (cdr (assoc namespace env))) env))

(defun alist/augment* (env namespace fresh-alist)
  (acons namespace (nconc fresh-alist (cdr (assoc namespace env))) env))

christophejunke

% tested with http://eclipseclp.org/

divisors_term(_, [3,5],"FizzBuzz").
divisors_term(_, [3],  "Fizz").
divisors_term(_, [5],  "Buzz").
divisors_term(N, [],   N).

% first clause, always fails, but with side-effects
fizz_buzz :-
    % backtrackably iterates N from 1 to 100 by 1

christophejunke

#include <stdio.h>
#include <stdbool.h>

int main (void)
{
        /* PARAMETERS */

        /* Upper bound of loop (inclusive) */
        const unsigned int upper_bound = 12;