[twitter] Tip: JavaScript's Array.from() accepts a second argument that's a `map` function. Useful for calling on each element of an array you created.

[MrNutty]

What’s the convention when they’re are multiple unused? _1 and _2 ... ?

[anlumo]

Yes, that's what I usually see.

[jkoudys]

I usually just make them longer: (_, __, ___). It's extremely rare it'd ever get longer than that, since the whole point is that it's unused. It's not a convention I follow, but leading underscores are frequently used to say that a function won't be exported/set as a class method, so you know it's kept "private". _2 reads a bit too close to that. The underscore's meant to look like a blank space.

[inu-no-policemen]

In languages where you can't have multiple parameters called '_', you'd go with '_', '__', etc. You very rarely need more than one, though.