About
Buy my book
Exceptional Ruby is the definitive guide to exceptions and failure handling in Ruby.
Tag Archives: oo
Early access beta of “Objects on Rails” Now Available
Often, at conferences and users group meetings, I find myself discussing the intersection of Ruby on Rails, Object-Oriented development, and Test-Driven Development, and I’ll mention something like “I prefer to develop my business objects first, and add ActiveRecord in later”. This usually leads to … Continue reading
Demeter: It’s not just a good idea. It’s the law.
Is #try really so bad? In response to my recent post about #try being a code smell, a lot of people made the reasonable objection that the example I used—of using #try on a a Hash—was a pathological case. A … Continue reading
Posted in Ruby
Tagged bdd, coupling, demeter, design, law of demeter, objects, oo, oop, ruby, Ruby on Rails, structural coupling, tdd, testing
67 Comments
Null Objects and Falsiness
Thank you to Ben Hamill for sending me a question that prompted this post. Checking for object presence Very often in Ruby code, we would like to execute some action only if an object is present: def slug(title) if title … Continue reading
Posted in Ruby
Tagged design patterns, Null Object, oo, patterns, Presenter Pattern, ruby
30 Comments
Testing Private Methods
Periodically the question of how to test private methods comes up at work or online. My answer is: don’t. It may seem trite, but there is some reasoning behind it. Private methods are, by definition, implementation details. If you are … Continue reading
