Array#findIndex and Array#findIndexBy

[buschtoens]

Rendered

[kellyselden]

My understanding of the Ember Array API (and Object) are basically frozen as we move away from them and/or extract them?

[mmun]

Kelly's right. The Ember.Array API is frozen. In the future we may move the Array/ArrayProxy classes to an addon where they can be iterated on.

If you're working with a native array and you're targeting modern browsers (i.e. not IE11) then you can just use the native Array.prototype.findIndex. If you are targetting IE11, then you'll need to use something like ember-lodash.

If you need to support more general usages of the Ember.Array mixin that rely on objectAt then must first map the object to a native array using toArray():

post.get('comments').toArray().findIndex(comment => {
  return comment.get('title') == "Hello world"
});

[aalimovs]

@mmun FYI, with toArray() the order is not guaranteed, see here. Not sure why though