minor tweaks, README correction

Author: defunkt

README

@@ -2,14 +2,15 @@ By Blaine Cook.
 
 http://romeda.org/blog/2007/04/mapreduce-in-36-lines-of-ruby.html
 
-If you want to add `dinject` (reduce) please do.
+If you want to add `dinject` (reduce) please do:
+http://github.com/defunkt/mapreducerb
 
 In your shell:
 $ sudo gem install RingyDingy
 $ sudo gem install ruby2ruby
 $ ring_server &
-$ ruby mapreduce_runner &
-$ ruby mapreduce_runner &
+$ ruby mapreduce_runner.rb &
+$ ruby mapreduce_runner.rb &
 
 In IRB:
 >> require 'mapreduce_enumerable'

mapreduce_enumerable.rb

@@ -4,12 +4,12 @@
 
 module Enumerable
   def dmap(&block)
-    self.each_with_index do |element,idx|
+    each_with_index do |element,idx|
       ring_server.write([:dmap, Process.pid, block.to_ruby, element, idx])
     end
 
     results = []
-    while results.size < self.size
+    while results.size < size
       result, idx = ring_server.take([:dmap, Process.pid, nil, nil]).last(2)
       results[idx] = result
     end
@@ -18,9 +18,6 @@ def dmap(&block)
   end
 
   def ring_server
-    return @ring_server if @ring_server
-
-    ringy_dingy = RingyDingy.new nil
-    @ring_server = ringy_dingy.ring_server
+    @ring_server ||= RingyDingy.new(nil).ring_server
   end
 end

���mapreduce_runner.rb

@@ -2,8 +2,7 @@
 require 'ruby2ruby'
 require 'ringy_dingy'
 
-ringy_dingy = RingyDingy.new nil
-ring_server = ringy_dingy.ring_server
+ring_server = RingyDingy.new(nil).ring_server
 
 loop do
   pid, block, element, idx = ring_server.take([:dmap, nil, nil, nil, nil]).last(4)