class String
Public Instance Methods
palindrome?()
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# File lib/palindrome.rb, line 2 def palindrome? if self.nil? #self can't be null, neverthless validate it abort "Something went wrong, string input is nil" end text = self.scan(/[[:alnum:]]/).join.downcase #only get alphanumeric chars if text.empty? return false end is_palindrome = true char_array = text.split "" while char_array.length > 1 && is_palindrome is_palindrome = char_array.pop == char_array.shift end is_palindrome end