Include palindromes in the example.

examples/dictionary_scan.rb

@@ -1,30 +1,41 @@
 require_relative '../lib/wordplay'
 
+# Determine the longest words in the supplied group.
+#
+# words - Array
+#
+# Returns an Array.
+def longest_words(words)
+  words.sort_by { |w| w.size }.tap do |sorted|
+    longest = sorted.last.size
+    sorted.delete_if { |w| w.size < longest }
+  end.sort
+end
+
 SOURCE = '/usr/share/dict/words'
 
 raise "Dictionary not available!" unless File.exists?(SOURCE)
 
-match_count   = 0
 full_count    = 0
-longest_words = [""]
+ordered_words = []
+palindromes   = []
 
 # Loop the source file for words to check
 File.foreach(SOURCE, "\n") do |word|
   word.strip! # remove the linefeeds
 
   if word.size > 1 # exclude one-character words
-    if Wordplay.new(word).ordered_letters?
-      puts word
-      match_count += 1
-      longest_words << word if word.size >= longest_words.last.size
-    end
+    wordplay = Wordplay.new(word)
+
+    ordered_words << word if wordplay.ordered_letters?
+    palindromes   << word if wordplay.palindrome?
 
     full_count += 1
   end
 end
 
-longest = longest_words.last.size
-longest_words.delete_if { |w| w.size < longest }
+longest_ordered_words = longest_words(ordered_words)
+longest_palindromes   = longest_words(palindromes)
 
-puts "\nMatching words: #{match_count} out of #{full_count}"
-puts "Longest words: #{longest_words.join(', ')}"
+puts "Ordered words (#{ordered_words.size} of #{full_count}), longest: #{longest_ordered_words.join(', ')}"
+puts "Palindromes (#{palindromes.size} of #{full_count}), longest: #{longest_palindromes.join(', ')}"