Axel Rauschmayer wrote:
My main point was: any kind of simplification of the current
situation helps (even typeof o === "null" which, OTOH, might not be
worth the risk).
We can't change typeof null === "null". V8 tried and it broke the
web, and 1JS means we do not want typeof changing rules under module
{...} -- that's a gratuitous refactoring hazard.
typeof (function(){}) == "function" && typeof null == "object" &&
typeof {} == "object" -- just grieve and accept! I have :-P. Doesn't
mean typeof is not useful and indeed widely used, and important for
the ==/=== two-way implication. Other type tests would work for that
implication, but typeof is the one in the language.
I agree, sorry for not having been clearer – that’s what I meant by
“ might not be worth the risk”. But it seems to have come up again as
a possibility in this thread.
Not that I saw. Changing typeof result for existing inputs is off the
table with 1JS.
Regarding cross-frame: Many explanations on the web of determining
whether a value is an array sound like this is an impossible task
(ignoring Array.isArray()) and that’s a shame. Alas, I’m not sure
how one could do better here, it’s really a tricky problem.
postMessage seems like a partial solution.
Or Object.prototype.toString.call(x).slice(8, -1) === "Array"? Not
iron-clad but prior to Array.isArray, nothing is.
Yes, but yet another special case: “use typeof (along with === and
!==), except where you have to use instanceof, except where you have
to access [[Class]] in a non-obvious manner”.
I’m not complaining, merely suggesting that there must be a better
way. But I’ll offer something concrete by writing up a few thoughts.
Definitely can have better library solutions, including something in the
standard library when "baked".
Let a thousand flowers bloom? (That was not auspicious for most flower
growers, but nm.) The problem then becomes picking the prettiest flower,
especially if the various users do not all agree.
/be
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