> For standard arrays, for in.. always goes in reverse order. I think it is likely to be the reverse order of how the elements were added, not reverse numerical order of the indices. But please don't count on this behavior continuing to be supported. Ecmascript doesn't require it, and it isn't necessarily the most performant implementation.
- Gordon -----Original Message----- From: Tracy Spratt [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 23, 2005 7:57 PM To: [email protected] Subject: RE: [flexcoders] Re: internal representation of an array For standard arrays, for in.. always goes in reverse order. You must use array.reverse to iterate in the normal order. Don't know about Associative arrays/objects. Tracy -----Original Message----- From: Eric Raymond [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 23, 2005 7:59 PM To: [email protected] Subject: [flexcoders] Re: internal representation of an array --- In [email protected], Gordon Smith <[EMAIL PROTECTED]> wrote: > The Flash player implements both Array and Object as hashtables. In Two somewhat related questions: 1) How does the implementation work with "for in" loops? Is there any natural order in which the propery names are returned? Does this vary from an Array to an Object? 2) Is there an "efficient" way to walk a sparsely populated array in order? That is if a[2], a[100] and a[2000] are the only elements of an array, is there a way to visit the three nodes in order without testing all the "empty" elements between the sparse nodes. for (var i:Number=2; i < a.length; i++) { if (a[i] != undefined) ... } If the array elements were created in order of the increasing index, would that help? That is, walking the sparse elements in creation order would suffice in this case. Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/flexcoders/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
