diff options
| author | Colin Okay <cbeok@protonmail.com> | 2020-08-13 10:38:30 -0500 |
|---|---|---|
| committer | Colin Okay <cbeok@protonmail.com> | 2020-08-13 10:38:30 -0500 |
| commit | e8c0f8e58b0039d8d3ed886654a5452168168436 (patch) | |
| tree | 5e9034a3b8cee68a4dad8bb3d35e8ae3a3f457b3 /examples.lisp | |
| parent | 61c06fc10ee2bad8d810d342a707677ede2c5f78 (diff) | |
removed replaced $and $or with macros; added reader macro for $$
Diffstat (limited to 'examples.lisp')
| -rw-r--r-- | examples.lisp | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/examples.lisp b/examples.lisp index 7bd44e2..973ebee 100644 --- a/examples.lisp +++ b/examples.lisp @@ -1,15 +1,14 @@ (defpackage #:lt-examples - (:use #:cl #:lambda-toosl)) + (:use #:cl #:lambda-tools)) ;; http://rosettacode.org/wiki/Luhn_test_of_credit_card_numbers (defun luhn (n) (flet ((sum-dig (x) (if (> x 9) (- x 9) x))) - (>> n - #'reverse - ($$ (map 'list #'digit-char-p $char)) - ($$ (mapcar #'* - (loop :for i :upto (length $digits) :collect (1+ (mod i 2))) - $digits)) - ($$ (zerop (mod (apply #'+ (mapcar #'sum-dig $digits)) 10)))))) + (>> n #'reverse + #$(map 'list #'digit-char-p $char) + #$(mapcar #'* + (loop :for i :upto (length $digits) :collect (1+ (mod i 2))) + $digits) + #$(zerop (mod (apply #'+ (mapcar #'sum-dig $digits)) 10))))) |