From 4a9b515ea4928e6809e09a80a37d9f66aa051430 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Tue, 11 Feb 2014 09:36:15 -0500
Subject: [PATCH] store the generation of the last best program found

---
 genetic.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/genetic.rb b/genetic.rb
index 6cf60f1..603454f 100755
--- a/genetic.rb
+++ b/genetic.rb
@@ -26,6 +26,7 @@ def main
   generation = 0
   begin
     last_best = nil
+    last_best_generation = 0
     while true
       generation += 1
       programs += programs.map do |grade, p|
@@ -40,6 +41,7 @@ def main
       programs = programs.take(NUM_PROGRAMS)
       if last_best.nil? or programs.first.first < last_best
         last_best = programs.first.first
+        last_best_generation = generation
         $stdout.write("\rGrade: #{last_best}, output: #{programs.first.last.execute.inspect}                    ")
       end
       if programs.first.first == 0
@@ -52,7 +54,7 @@ def main
   rescue Interrupt
     puts
     puts "Canceled at #{generation} generations"
-    puts "The best program (grade #{programs.first.first}) is:"
+    puts "The best program (grade #{programs.first.first}, generation #{last_best_generation}) is:"
     puts programs.first.last
   end
 end