Check rows

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  rows: [
    {name: 'bob', value: "24"},
    {name: 'peter', value: "32"}
  ],
  
  checkValue: Ember.observer('rows.@each.value', function () {
    const unique = Ember.get(this, 'rows').uniqBy('value')
    if (unique.length === 1) alert('matching')
  })
 
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component}}
<br>
<br>

templates.components.my-component.hbs

<table>
  {{#each rows as |row|}}
  <tr>
    <td>{{row.name}}</td><td><input value={{row.value}} onblur={{action (mut row.value) value='target.value'}}></td>
  </tr>
  {{/each}}
</table>

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {}
}