Component programming with ranges

Preface

This article was inspired by Walter's article on component programming in D and based on a related discussion thread in the D forum. In short, Walter's article addressed the question of why, despite years of carefully programming in paradigms that purportedly makes your code more reusable, so very little code from the past is actually reused. Component-style programming, in which code is assembled from reusable components may be data sources, data sinks, or algorithms (that transforms data sources and puts them into data sinks), is proposed as a possible solution to this problem.

In this article, we will consider how component-style programming can greatly untangle a complicated algorithm into manageable pieces that are straightforward to write, easy to debug, and reusable.