Code Freely, Live Fully
Code Freely, Live Fully
Introduction The observer pattern is a software design pattern that allows an object, usually called the subject, to maintain a list of dependents, called observers, and notify them automatically of any state-changes. Many languages have this pattern either built-in or…
Introduction You can use the memento pattern to (partially) expose the internal state of an object. One use case for this pattern is to serialize an object to a file or as JSON for example, another is to build an…
Introduction The prototype-pattern is a creational design pattern that allows us to create new objects by cloning existing ones, i.e. the existing objects function as a kind of template. This can save time in some cases when for example an…
Introduction The Decorator pattern can be used to dynamically alter or add functionality to existing classes. This pattern is oftern more efficient than subclassing because it relieves us of the need of defining a new object. So, what does it…
Introduction Go is known for its simplicity and clarity, but when it comes to managing state or creating reactive data flows, developers often have to write a lot of boilerplate. With the introduction of generics in Go 1.18, new patterns…
Introduction In my previous post I described simple implementation of the Object Pool pattern. In this post I will extend this pattern using generics. It will become slightly more complicated, but also more flexible, and probably more solid. Implementation in…
Introduction On this page I described building a simple web API with a Postgres database at the backend. For this I used the Gin web framework which is pretty fast in itself. A nice extension however would be to use…
Introduction The memento pattern can be used to (partially) expose the internal state of an object. One use case for this pattern is to serialize an object to a file or as JSON for example, another is to build an…
Introduction The memento pattern can be used to (partially) expose the internal state of an object. One use case for this pattern is to serialize an object to a file or as JSON for example, another is to build an…
Introduction The state pattern is a behavourial state pattern, which allows an object to change its behaviour when its internal state changes. Since this sounds quite cryptic, let’s have a look at the diagram: A short breakdown: As you can…
Introduction The template method pattern is a behavourial design pattern which allows you to define the template, or the skeleton of an operation in a base class, while allowing the subclasses to override specific steps or all steps of the…
Introduction In a previous post I described the Builder pattern in Rust. However, even though the solution worked, it did not look very elegant. Hence, I found a more elegant solution, which I will present here. Let us remind ourselves…