Add day 07

[adventofcode2020.git] / src / utilities.lisp

diff --git a/src/utilities.lisp b/src/utilities.lisp
index 91e74d11b1aeb5a8a6316c11562e7934f9eb0aa1..6e0ca47d84f02726cd4becea7d1db06bc557b60d 100644 (file)
--- a/src/utilities.lisp
+++ b/src/utilities.lisp
@@ -8,6 +8,9 @@
 (defun int-list-from (str)
   (mapcar #'parse-integer (list-from str)))
 
+(defun list-list-from (str)
+  (split-sequence "" (list-from str) :test #'string=))
+
 (defun cartesian-product (A B &rest C)
   (let ((helper (lambda (X Y)
                   (if Y (loop for x in X