Ember Set TwoDimensional Array

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  matchingArray: [
    [{
      "property":  'pathname',
      "variable": null,
      "equal": true,
      "operator": 'equals',
      "value": null
    }]
  ],
  actions:{
    test(){
      console.log("test");
      var k = this.get('matchingArray');
      Ember.set(k[0][0],'operator','SuccessOperator');
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{#each matchingArray as |temp| }}
{{#each temp as |temp1|}}
{{temp1.operator}}
{{/each}}
{{/each}}
<br>
<button {{action "test" }}> Button </button>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "1.13.13",
    "ember-data": "2.5.2",
    "ember-template-compiler": "1.13.13"
  }
}