Yes, it's a good thing to mention for python devs, but I don't know if it's necessary in any other context. The article's title is "What Python developers need

Yes, it's a good thing to mention for python devs, but I don't know if it's necessary in any other context. The article's title is "What Python developers need to know before migrating to Go". I don't know how many times I need to repeat this. I can't go back and edit the original post to clarify. Anyway, about JS, you are right; I was thinking "var" was like "local" or "my", but it isn't. Oh well.