Set/Map properties

[Jamtis]

Hi,

I think Array are not enough today!

Polymer should support Sets and Maps as well.

Like this:

properties: {
    prop: {
        type: Set,
        value: function() {return new Set();},
        notify: true
    }
}

Therefore the Polymer.Base must support add/delete/set (set is a little difficult) functions similar to the push/splices functions for arrays.

What do you guys think?

Is this a general necessity?

How can it be accomplished?

[TimvdLippe]

Yes you can! Please check out the JSBin in #3751 (comment) for an example.