New Twiddle

components.my-component.js

import Ember from 'ember';

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

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  init() {
    this._super(...arguments);
    this.set('things', [
      'qux',
      'foo',
      'baz',
      'bar'
    ]);
  },
  
  sortedThings: Ember.computed('things.[]', function() {
    return this.get('things').sort();
  }),
  
  actions: {
    removeThing(thing) {
      console.log('removeThing', thing);
      this.get('things').removeObject(thing);  
  	},
    
   	toggleEditMode() {
      this.toggleProperty('editMode'); 
    }
  }
});

templates.application.hbs

{{#my-component things=sortedThings as |thing|}}
  {{thing}}

  {{#if editMode}}
    <button onclick={{action 'removeThing' thing}}>
      Remove {{thing}}
    </button>
  {{/if}}
  <br>
{{/my-component}}

< hr/>
{{#each sortedThings as |thing|}}
  {{thing}}

  {{#if editMode}}
    <button onclick={{action 'removeThing' thing}}>
      Remove {{thing}}
    </button>
  {{/if}}
  <br>
{{/each}}
<br>

<button onclick={{action 'toggleEditMode'}}>
  Toggle edit mode
</button>

templates.components.my-component.hbs

{{#each things as |thing|}}
  {{yield thing}}
{{/each}}

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "canary",
    "ember-data": "2.8.0",
    "ember-template-compiler": "canary",
    "ember-testing": "canary"
  },
  "addons": {}
}