A Beginner’s Guide to Java Enums

An Enum in Java is a special data type that encompasses a set of predefined constants. When setting a variable of that Enum type, you have to use one of the constants that you define for it. A great example is the compass: In the above example, we create a new enum and it’s predefined […]

Testing a Cobra CLI in Go

Go has a fantastic library for writing CLI’s (Command Line Interfaces) called Cobra. I’ve been working on a CLI named Deckard for a few months now. Being new to Go, I had (lazily) shied away from writing tests. However, after thinking about my test plan and doing a little refactoring, I’ve found a great way […]

How Golang Interfaces Work

Interfaces are a tool that allows you to define the behavior of objects and in Golang, interfaces are no different (except that they work on structs instead of “objects”). However, Go has some strange features for interfaces that users from other languages might not expect. Let’s take it slow and start by defining an interface […]

Golang: What is a receiver function?

Classes aren’t really a thing in go, so you cant have instance methods (like Java or similar), however, you may have noticed some functions in Go that appear to be instance methods. These are Go’s receiver functions. The way they work is quite simple. If you have a struct like so: You could write a […]

Posted in GoTagged

Generating HTML from a List in Elm

Elm is a fantastic language for building web applications. It provides a rich DSL for writing HTML that functions in a similar way to JSX (but still quite different). Overall, I enjoy writing it, however, I often forget how to generate HTML from a list of data in Elm. Indeed, the problem is not that […]

Prompt the user for a rune at the terminal in Go

I’ve been spending a lot of my spare time working on a Go project called Deckard. It’s a command line interface (or CLI) for handling database schema changes. Recently, I found myself wanting to prompt the user for a rune before running a command in that CLI. Why would I do this? Deckard handles schema […]

Posted in GoTagged

Your application should not be responsible for Database Migrations.

A herd of animals migrating

Classic database/schema migration patterns are a nightmare for modern systems. As Software Engineers push for a more distributed ecosystem, one is tempted to ask: “Why should the code that manages one system, live with the application code of another system?” “But Brad, this is really convenient”. I agree that it is really convenient when you’re […]