Re: Array property of custom object

On 5/3/16 11:28 AM, Mihai Dobrescu wrote:
> Now, I have the question how could I use js::proxy to attain my goal, being aware of its drawbacks. I'm sure it involves memory fragmentation and cpu load.

I don't see why it would involve "memory fragmentation".

To use a js::Proxy, you define an appropriate proxy handler to do 
whatever you want.  Basically, you directly implement the various 
internal methods from the ES spec for your object.

http://mxr.mozilla.org/mozilla-central/source/dom/base/WindowNamedPropertiesHandler.cpp 
has an example of a simple proxy that you might be able to repurpose.

> Will it make possible to simply iterate too?

I don't know what you mean by "iterate" exactly, but obviously a proxy 
would allow you to do for-in enumeration (via 
getOwnEnumerablePropertyKeys) and you can always do for-of iteration by 
providing an iterator implementation for your object.

-Boris