Execute around

debugging_and_expectation.rb

@@ -0,0 +1,21 @@
+def with_debugging
+	puts "Got Here!"
+	result = yield
+	puts "Result was #{result}"
+end
+
+# with_debugging do
+#   magic_number = (23 - Time.now.hour) * Math::PI
+# end
+
+def with_expectation(expected_value)
+	puts "Running test"
+	result = yield
+	if expected_value == result
+		puts "Passed."
+	else
+		puts "Failed\nExpected #{expected_value}, but got #{result}"
+	end
+end
+
+with_expectation(5) { 2 + 2 }

execute_around.rb

@@ -0,0 +1,14 @@
+def tag(value)
+	print "<#{value}>"
+	print yield
+	print "</#{value}>"
+end
+
+tag(:h1) { "Breaking News!" }
+tag(:h2) { "Massive Ruby Discovered" }
+
+tag(:ul) do
+  tag(:li) { "It sparkles!"}
+  tag(:li) { "It shines!"}
+  tag(:li) { "It mesmerizes!"}
+end