You’re not wrong but I think when you’re teaching someone just having 1 parent and 1 child class makes for a bad example I generally prefer to use something with a lot of different children.
My go-to is exporters. We have the exporter interface, the generic exporter, the accounting exporter and the payroll exporter, to explain it.
At school, the only time I used inheritance was 1 parent (booking) and 1 child (luxury) this is a terrible example imo.
Same, I always remember this with interfaces and inheritance, shoehorned in BS where I’m only using 1 class anyway and talking to 1 other class what’s the point of this?
After I graduated as a personal project i made a wiki for a game and I was reusing a lot of code, “huh a parent class would be nice here”.
In my first Job, I don’t know who’s going to use this thing I’m building but these are the rules: proceeds to implement an interface.
When I have to teach these concepts to juniors now, this is how I teach them: inheritance to avoid code duplication, interfaces to tell other people what they need to implement in order to use your stuff.
I wonder why I wasn’t taught it that way. I remember looking at my projects that used this stuff thinking it was just messy rubbish. More importantly, I graduated not understanding this stuff…
My favourite is always;
Lemme quickly write this test, it passes great, if I make this little change it’ll fail. It’s still passing, damn.