Map/Set.prototype.size

David Herman dherman at mozilla.com
Fri Oct 12 14:16:51 PDT 2012


On Oct 12, 2012, at 12:14 PM, Erik Arvidsson <erik.arvidsson at gmail.com> wrote:

> On Fri, Oct 12, 2012 at 11:16 AM, David Bruant <bruant.d at gmail.com> wrote:
>> Firefox has implement a Map/Set.prototype.size *method* to query the number
>> of mapping/elements.
>> It's not in the strawman. It appears in the latest draft, though weirdly
>> enough Map.prototype.size is a function with an unused argument.
>> What about making it an getter instead of a function? I guess we also don't
>> need the extra parens to request for Map#keys, Map#values, Map#items.
> 
> For keys, values and items I think they are cleaner as methods since
> they return a new iterator every time.

Agreed.

Dave



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