README to Markdown and credit to Alex D

README → README.markdown

@@ -1,9 +1,13 @@
-Simple analysis of Powerball lottery number stats, using Ruby's Enumerable.
+# Powerball Numbers
 
+### Simple analysis of Powerball lottery number stats, using Ruby's Enumerable.
+
+```bash
  ➤ ruby ./powerball.rb 
 Getting Powerball drawing data from 02/20/2012 back to 11/01/1997 ...
 Got 1738801 bytes of Powerball data. Stand by for parsing.
 Examining results of 1493 drawings...
 Top 5 numbers: 41, 20, 32, 16, 26
 Top Powerball: 37
- ➤
+ ➤ 
+ ```

powerball.rb

@@ -4,17 +4,14 @@
 require 'date'
 
 module Enumerable
+  # with a big nod to Alex D who posted at StackOverflow
+  # http://stackoverflow.com/questions/9127971/sort-array-by-popularity-and-time-in-ruby
   def to_histogram
     result = Hash.new(0)
     each { |x| result[x] += 1 }
     result
   end
 
-  def most_popular
-    h = self.to_histogram
-    max_by { |x| h[x] }
-  end
-
   def most_popular_n(n)
     ret = []
     h = self.to_histogram
@@ -24,6 +21,10 @@ def most_popular_n(n)
     end
     ret
   end
+
+  def most_popular
+    most_popular_n(1).first
+  end
 end
 
 white_balls = []