Set length property

[Brendan Eich]

Brendan Eich wrote:
> Tab Atkins Jr. wrote:
>>> IME they're ducktyped by the presence of forEach (this is far from 
>>> perfect).
>>> >  Length has nothing to do with iterability. What about generators?
>>
>> I don't want to go looking anything up right now, but I have lots of
>> memories of things looking for the presence of "length" to denote an
>> array-like.
>
> Array-like != iterable.

But I should have written

Array-like <: Iterable

/be