This is probably what you are thinking of: http://blog.cleancoder.com/uncle-bob/2014/06/20/MyLawn.html http://blog.cleancoder.com/uncle-bob/2014/06/20/MyLawn.ht

This is probably what you are thinking of: http://blog.cleancoder.com/uncle-bob/2014/06/20/MyLawn.html http://blog.cleancoder.com/uncle-bob/2014/06/20/MyLawn.html (It was linked to in the comments of the blog post.)