I'm not sure whether this is a bug or it's still open, so I've posted it here first -- sorry if this has already been discussed, I've tried to find related threads and bug reports but to no avail.
As of Rev 22 of the ES6 spec, [[ArrayIterationKind]] is described as follows (ยง22.1.5.3): > A string value that identifies what is to be returned for each element > of the iteration. The possible values are: "key", "value", "key+value", > "sparse:key", "sparse:value", "sparse:key+value". I haven't seen the "sparse" forms being referenced anywhere else, so I'm just checking whether they're actually needed or not. Is this just an oversight, or is it actually significant?
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