If you’ve worked with me or followed me for a while it probably shouldn’t surprise you that I agree with Hadi’s tweet below 👇🏻 …
“I’m declaring an interface because one day I may have multiple implementations”
Sure. So when that day comes, do an Extract Interface refactoring. Most IDEs do it for you in a single click. Until then, drop the interface.— Hadi Hariri (@hhariri) May 10, 2022
My approach is always to only create interfaces IF and WHEN they are needed and to avoid doing too much upfront ‘just in case’ design.
A lot of developers fail to realize that even though interfaces are very simple to create initially, using them is not a ‘one-time cost’. Interfaces add architectural complexity and have a real ongoing cost so by all means add them when needed but not before…
