ruby - anagram

use select

ruby/anagram/anagram.rb

@@ -2,13 +2,17 @@
 class Anagram
   def initialize(word)
     @word = word.downcase
-    @sorted = @word.chars.sort.join
   end
 
   def match(candidates)
-    candidates.map do |candidate|
-      sorted_candidate = candidate.downcase.chars.sort.join
-      candidate if @sorted == sorted_candidate && @word != candidate.downcase
-    end.compact.sort
+    candidates.select do |candidate|
+      sorted(@word) == sorted(candidate) && @word != candidate.downcase
+    end
+  end
+
+  private
+
+  def sorted(word)
+    word.downcase.chars.sort.join
   end
 end