cherry-pick

components.people-list.js

import Ember from 'ember';

export default Ember.Component.extend({
  	filter: null,
  	filteredPeople: Ember.computed('people', 'filter', function() {
    	if (this.get("filter") === null) {
        return this.get("people");
      } else {
        return this.get("people").filter(
          (person) => parseInt(person.height, 10) <= this.get("filter"),
        );
      }
    }),
  
  actions: {
    filterHeight(height) {
      this.set("filter", height);
    },
    showPerson(person) {
      alert(person);
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route("scientists");
});

export default Router;

routes.scientists.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return fetch("https://swapi.co/api/people/").
    	then(r => r.json()).
    	then(r => r.results);
  }
});

templates.application.hbs

<h1>PeopleTracker</h1>

{{outlet}}

templates.components.people-list.hbs

<h2>{{title}}</h2>

<button {{action 'filterHeight' 160}}>Shorties</button>

<ul>
{{#each filteredPeople as |person|}}
  <li {{action "showPerson" person}}>{{person.name}}</li>
{{/each}}
</ul>

templates.scientists.hbs

{{people-list title="List of scientists" people=model}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}