yield within each

components.super-list.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
	items: undefined,
  
  init() {
    this._super(...arguments);
    this.set('items', ['aa', 'bb', 'cc']); 
  }
});

templates.application.hbs

There are {{items.length}} items:

{{#super-list items=items as |item|}}
	an item: {{item}}
{{/super-list}}

templates.components.super-list.hbs

<ul>
{{#each items as |item|}}
	<li>
  	[{{yield item}}]
  </li>
{{/each}}
</ul>

twiddle.json

{
  "version": "0.13.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}