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  1. (defun palindrome-p (str)
  2.   (let ((str (remove-if-not #'alpha-char-p str)))
  3.     (string-equal str (reverse str))))
  4.  
  5. (defun check-palindrome (str)
  6.   (format t "~s is ~:[NOT ~;~]a palindrome.~%"
  7. 		  str (palindrome-p str)))
  8.  
  9. (check-palindrome "boo")
  10. (check-palindrome "A man, a plan, a cat, a ham, a yak, a yam, a hat, a canal-Panama!")
  11. (check-palindrome "A tin mug for a jar of gum, Nita.")
  12. (check-palindrome "A Toyota! Race fast, safe car! A Toyota!")
Success #stdin #stdout 0.02s 10584KB
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"boo" is NOT a palindrome.
"A man, a plan, a cat, a ham, a yak, a yam, a hat, a canal-Panama!" is a palindrome.
"A tin mug for a jar of gum, Nita." is a palindrome.
"A Toyota! Race fast, safe car! A Toyota!" is a palindrome.
https://ideone.com/yBEqLY
language:
Common Lisp (clisp 2.49.92)
created:
11 years ago
visibility:
public

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