Bill Frantz (2014-03-23T21:00:33.000Z)
domenic at domenicdenicola.com (2014-03-26T23:21:00.093Z)
On 3/23/14 at 11:24 AM, brendan at mozilla.org (Brendan Eich) wrote: >Any old object. It's a structural or "duck-typed" protocol. > >We won't therefore be adding complexity, which is also bad on >its own. KISS wins here. More elaborate protocols for harder or >let's say rarer cases are fine and not part of the mandatory minimum. It seems it should be easy for any user or library to introduce in generalized intermediate object which implements the `current` or 'prev' property, so it doesn't need to be in the language.