はてなブックマーク

Occasionally I hear someone say that the Clojure community is against testing. I understand the sources of this – Rich Hickey (creator of Clojure) has spoken about testing in a number of talks and I think some of those comments have been misconstrued based on pithy tweet versions of more interesting longer thoughts. I’d like to give my own opinions on testing, what I think Rich has said, and what

This entry inaugurates a new series on patterns that I hate. Hate is a strong word, perhaps a better name would be “patterns that I’ve frequently seen lead to ruin”. But that seemed too long. Anyhow, the singleton pattern is the hands-down #1 pattern that can lead me to froth at the mouth. When a programmer first stumbles on GoF, Singleton seems to be the pattern that they first latch on to becaus

In the first episode of this series I explored the Singleton pattern and why it sucks. In this episode, I take aim at the Template Method pattern. To refresh your memory, the Template Method pattern is when you encapsulate the outline of an algorithm or lifecycle in an abstract class, but define certain specific steps as abstract methods. This class then forms a “template” that others can subclass