Haven't used React but I'm sceptical. In what case do you need to use `this`? The only time I believe I've used this was maybe using a class? Which is shit so

Haven't used React but I'm sceptical. In what case do you need to use `this`? The only time I believe I've used this was maybe using a class? Which is shit so why would I want to do that anyway? Okay, so there are footguns. Don't use them, use a linter, problem solved. That doesn't look like math. What are you saying exactly? What's your problem with let res = a.splice(4, 1) ? I don't understand really, the method name and extra parameter?