After several years of practicing Go, I must admit that I’m not a big fan of variadic functions1. I’ll try to explain why and why I greatly prefer using structs. Definition Let’s start with a quick reminder of what variadic functions are for those unfamiliar with the concept. This pattern is generally used to configure options in a flexible/dynamic way when creating an instance of a structure. Let’s look at a concrete example: ...
Introduction In Go, as in all programming languages, it’s sometimes useful to have optional arguments in functions. The Go language supports this functionality but in a very limited way, as shown in the example below: func Greetings(name string, age ...int) { if len(age) > 0 { fmt.Printf("Hello %s, you are %d years old\n", name, age[0]) } else { fmt.Printf("Hello %s\n", name) } } func main() { Greetings("Alice") Greetings("Bob", 30) Greetings("Chad", 40, 100) // only the first value is used } Note The complete example is available via the Go playground: here. ...