Lisp
I deciced to give Lisp a try and currently I’m struggling with a lot of parentheses and a lot of lambdas. Anyway, for the first day (or night) I’m really proud of this beauty: 🙂
;; Problem 3-9 (without tolerance) (defun rightp (a b c) (let ((longest-side-square (expt (car (sort (list a b c) '>)) 2)) (shorter-side-square-sum (apply '+ (mapcar (lambda (x) (expt x 2)) (cdr (sort (list a b c) '>)))))) (= longest-side-square shorter-side-square-sum)))
Thanks to Manuel of the BKNR project for their htmlize.lisp code!