Recipe 7.10. Hiding Setup and Cleanup in a Block Method

7.10.1. Problem

You have a setup method that always needs to run before custom code, or a cleanup method that needs to run afterwards. You don't trust the person writing the code (possibly yourself) to remember to call the setup and cleanup methods.

7.10.2. Solution

Create a method that runs the setup code, yields to a code block (which contains the custom code), then runs the cleanup code. To make sure the cleanup code always runs, even if the custom code throws an exception, use a begin/finally block.