Tag: Software design
Posted on January 14, 2019
Readable Functions: Guard Clause
Guard Clauses are one of my favorite little tricks that allow simplifying code. A guard clauses is an if statement with a return in it. Consider the following code:
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function doThing() { var $thing = 'default'; if (someCondition()) { $thing = 'special case'; } return $thing; } |
Using a Guard Clause we can simplify it …
Posted on October 30, 2018
Readable Functions: Do One Thing
Several tricks and heuristics that I apply to write easy to understand functions keep coming up when I look at other people their code. This post outlines the second key principle. The first principle is Minimize State. Following …
Updated on October 30, 2018
Readable Functions: Minimize State
Several tricks and heuristics that I apply to write easy to understand functions keep coming up when I look at other peoples code. In this post I share the first of two key principles to writing readable functions. …
Updated on August 30, 2018
Base Libraries Should be Stable
In this post I go over the principles that govern package (library) design and one specific issue I have come across several times. Robert C Martin has proposed six Package Principles. Personally I find the (linked) description on …
Updated on August 22, 2018
Clean Architecture: UseCase tests
When creating an application that follows The Clean Architecture you end up with a number of UseCases that hold your application logic. In this blog post I outline a testing pattern for effectively testing these UseCases and avoiding …
Updated on November 3, 2018
The Fallacy of DRY
DRY, standing for Don’t Repeat Yourself, is a well-known design principle in the software development world. It is not uncommon for removal of duplication to take center stage via mantras such as “Repetition is the root of all …
Updated on July 31, 2018
Generic Entity handling code
In this blog post I outline my thinking on sharing code that deals with different types of Entities in your domain. We’ll cover what Entities are, code reuse strategies, pitfalls such as Shotgun Surgery and Anemic Domain Models …
Updated on July 31, 2018
Why Every Single Argument of Dan North is Wrong
Alternative title: Dan North, the Straw Man That Put His Head in His Ass. This blog post is a reply to Dan’s presentation Why Every Element of SOLID is Wrong. It is crammed full with straw man argumentation …
Updated on August 20, 2018
Simple is not easy
Simplicity is possibly the single most important thing on the technical side of software development. It is crucial to keep development costs down and external quality high. This blog post is about why simplicity is not the same …
Updated on August 20, 2018
Implementing the Clean Architecture
Both Domain Driven Design and architectures such as the Clean Architecture and Hexagonal are often talked about. It’s hard to go to a conference on software development and not run into one of these topics. However it can …
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