array-hash-fixed

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  totalLength: Ember.computed('data.@each.name', function() {
  	// doesn't matter, won't compute anyway
    return -1;
  })
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

helpers.my-hash.js

import Ember from 'ember';

export function myHash(params, hash) {
  return Object.assign({}, hash);
}

export default Ember.Helper.helper(myHash);

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component data=(array
	(my-hash name="Stefan")
  (my-hash name="Chris")
)}}
<br>
<br>

templates.components.my-component.hbs

<ul>
{{#each data as |item|}}
	<li>{{item.name}}</li>
{{/each}}
</ul>
Total Length: {{totalLength}}

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {
    "ember-composable-helpers": "1.1.3"
  }
}