a simple Ember.Select with a default selection

Every example I see, has a complex object for the selection (id, name etc.)

I'm trying to do a really simple thing and still can't.

The Select: {{view Ember.Select content=resultsPerPage selection=perPage}}

The controller (ember-cli):

export default Ember.ArrayController.extend({
  perPage: 10,
  resultsPerPage: ['10', '20', '50', '100'],
});

All I want now is for the Select to have a default value of 10, can't make it happen...