From 2194c6637e0fde2eaa8632f08c4ac672b37b4da1 Mon Sep 17 00:00:00 2001
From: Dan Buch <daniel.buch@gmail.com>
Date: Thu, 6 Oct 2011 22:13:36 -0400
Subject: [PATCH] doing 7.2

---
 cookbook/007/02.rb | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 cookbook/007/02.rb

diff --git a/cookbook/007/02.rb b/cookbook/007/02.rb
new file mode 100644
index 0000000..19498a9
--- /dev/null
+++ b/cookbook/007/02.rb
@@ -0,0 +1,21 @@
+def call_twice
+  puts "I'm about to call your block."
+  yield
+  puts "I'm about to call your block again."
+  yield
+end
+
+call_twice { puts "Hi, I'm a talking code block." }
+
+
+def repeat(n)
+  if block_given?
+    n.times { yield }
+  else
+    raise ArgumentError.new("I can't repeat a block you don't give me!")
+  end
+end
+
+repeat(4) { puts "Hello." }
+
+repeat(4)