p.133 rewrite "calculate_outstanding" with inject function.

kono · May 11, 2010 · 9003665 · 9003665
1 parent 693fe14
commit 9003665
Showing 1 changed file with 1 addition and 5 deletions.
diff --git a/chapter6/Extract_Method.rb b/chapter6/Extract_Method.rb
@@ -38,9 +38,5 @@ def print_details(outstanding)
 end
 
 def calculate_outstanding
-  outstanding = 0.0
-  @orders.each do |order|
-    outstanding += order.amount
-  end
-  outstanding
+  @orders.inject(0.0){|result, order| result + order.amount }
 end