Define ordering for sets and maps? about infra

[annevk]

I'm not sure I understand the problem. A map is by definition ordered: https://infra.spec.whatwg.org/#ordered-map.

[domfarolino]

I'm not saying we should define the fact that maps are "ordered" (we already do that). I'm asking if we should define how that ordering is determined. At least my assumption is that the "ordered" data structures rely on some sort of sorting to achieve that ordering. If you have an ordered set of Fetch request objects, and you iterate over the entire set, then in what order do you iterate over them? How do we "sort" the request objects? By ID? By URL? To be truly ordered a lot of languages would require you to pass in a custom comparator when one is not obvious from the input type.

[annevk]

There is no sorting. The order is defined through insertion.

[domfarolino]

I see, I guess I'm now realizing that's how JS's Set works too, etc. I guess I had std::map and std::unordered_map stuck in my brain when filing.