1st class ArrayObserver support in Polymer?

[Eric Bidelman]

We added 1st class support for PathObserver:

http://www.polymer-project.org/docs/polymer/polymer.html#observeblock

Is there similar support for observing array properties?

-eb

[Steve Orvell]

Array valued properties in polymer-elements are automatically array-observed. The *Changed method is called when the array length changes.

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[mich...@chromium.org]

Sorry to resurrect an old thread. Is this documented anywhere?

For array properties, the *Changed method is invoked in two different ways -- when the property itself is changed (i.e. set to a different array), the function is called with the standard arguments (newValues, oldValues, paths), but when the array is modified with methods from Array.prototype, the *Changed method is called with a single parameter (splices).

Is the behavior I'm seeing guaranteed for arrays? Will this change in 0.8?

Thanks!

Michael