Linter warns on unused for-of variable

[shicks]

The following is a pain to do in any other way when iter is an arbitrary iterable:

let count = 0;
for (const unused of iter) count++;

But the linter warns that unused is never read. Possible workarounds would be (1) don't warn about unused variables whose names start with "unused", (2) possibly restrict this check to for-of variables.

[Yannic]

I think a nice was of handling this would be to introduce a single variable _ for unused values which cannot be read.

let count = 0;
for (_ of iter) count++;

[Dominator008]

"_" shadows the popular library underscore.js so I would not use that. "unused" seems like a good heuristic to me.

[Yannic]

I thought about _ because it is used in Go for exactly this and using something similar sounded like a good idea to me, but you're right, it's not an option since it is used by a popular library and would break a lot of code. I'd still prefer a single name over a prefix