On 1/1/11, Angus Croll <[email protected]> wrote: > Hi Joe, > > Array is a constructor which is a function, and Function has no slice > function.
No, but in some implementations such as Mozillas', the Array constructor has generic methods including `slice`. var arr = Array.slice(arrayLike); The value in that is that it is more succinct than the clunky standard: var arr = Array.prototype.slice.call(arrayLike); It is not just a matter of keystroke savings, but the code reads much clearer because it requires less parsing not only for the interpreter, but also for the reader of the code. My related desire is for host objects to be specified to be implemented as native objects. That desire may sound like a contradiction because to some, "host object" means not native. However the spec does not preclude the possibility of a host object being implemented with native ES semantics and indeed, several implementations of that are seen (FF, Safari, Opera). In discussions with Allen WB and M. Miller, I discovered a surprising lack of clarity regarding the understanding of "what is a host object." See: <http://www.mail-archive.com/[email protected]/msg04566.html> This also came up on whatwg, and the goal is basically so that the program can have: Array.slice(document.childNodes); And it will work! I think that would be very simple and effective and I have been pushing to make this happen for over a year, both with ECMAScript group and with WHATWG/WebIDL folks. It seems like such a small thing, but apparently it is too simple or I don't know... Array.slice, MDC: https://developer.mozilla.org/en/new_in_javascript_1.6#Array_extras "Adding ECMAScript 5 array extras to HTMLCollection" (all messages) http://www.mail-archive.com/[email protected]/msg21056.html "[[Class]] property of host object" http://www.mail-archive.com/[email protected]/msg04566.html "Static Array and String Generics and Host Objects (ATTN IE Team)" Allen's reply https://mail.mozilla.org/pipermail/es-discuss/2009-December/010241.html -- Garrett -- To view archived discussions from the original JSMentors Mailman list: http://www.mail-archive.com/[email protected]/ To search via a non-Google archive, visit here: http://www.mail-archive.com/[email protected]/ To unsubscribe from this group, send email to [email protected]
