Is 'array.@each' correct?

[joliss]

I sometimes see people write (function() { ... }).property('array.@each'). Is that actually a correct way to bind to each element of the array?

Either way, we should clarify that on http://emberjs.com/guides/object-model/computed-properties-and-aggregate-data/ and perhaps http://emberjs.com/api/classes/Ember.MutableArray.html#property__each.

[wagenet]

@joliss that works fine, though it's slightly more efficient to do array.[].

[bradleypriest]

Similar thought, array.length would be sufficient for a lot of cases, wouldn't it, I assume it's more performant, should we mention that as well?

[krisselden]

observing array.length and array.[] are the same performance wise, they are both notified during .replace() which is what all mutations to an Ember.MutableArray go through. array.@each creates an EachProxy which installs observers, it is more for observing properties of the objects in an array.

[endash]

length is only notified though if the length ACTUALLY changes. Swapping out an element for instance would NOT notify length, while it WOULD notify [].

edit: 24 days ago... I have no idea why this showed up at the top of the list. very strange.

[wagenet]

I still see people making this error.