tc39/proposal-relative-indexing-method

Assignability

falsandtru opened this issue · 4 comments

falsandtru commented

Does .at method have ability to assign a new value like arr.at(-1) = 0? Or can you enable arr.at[-1] = 0?

ljharb commented

No, it doesn’t, and no, we can’t; JS doesn’t have “functions return assignable references” as a feature (imo, thankfully).

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falsandtru commented

I think the expected feature is a readable and writable accessor. But this proposal doesn't aim at updating an element via negative index?

ljharb commented

Correct, it is only for reading the value.

falsandtru commented

I see, thanks.