Preemptive Interface Anti-Pattern in Go
In this post I will describe the Preemptive Interface pattern often used in code and why I think it is generally an incorrect pattern to follow in Go. What is a Preemptive InterfaceInterfaces are a way to describe behavior and exist in most typed languages. Preemptive interfaces are when a developer codes to an interface before an actual need arrises. An example may look like the following. type A
What “accept interfaces, return structs” means in Go
I’ve mentioned a general guideline of accept interfaces, return structs in a previous post and multiple times on code reviews to coworkers, but often get the question “Why”. Especially since this isn’t a hard rule. The crux of the idea, and understanding when to bend it, is in the balance of avoiding preemptive abstractions while maintaining flexibility. The abstract gopherPreemptive abstractions
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