filter-example

controllers.application.js

import Ember from 'ember';
import {computed} from '@ember/object';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  jobOrders:[{zoneName: "orta", cityName: "ankara" },
            {zoneName: "marmara", cityName: "istanbul" }
            ],
  
  selectedZoneOrCityName:"orta",
  
  jobOrderCityNames: computed('selectedZoneOrCityName', 
 '[email protected]', '[email protected]', function() {
  let selectedZoneOrCityName = this.get('selectedZoneOrCityName');
  if (selectedZoneOrCityName) {
    return this.get('jobOrders').filter((jobOrder) =>{
    return (jobOrder.zoneName === selectedZoneOrCityName) || (jobOrder.cityName === selectedZoneOrCityName);
  }
).mapBy('cityName');
   } else {
    return [];
  }
}),
  
  
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
filtered city names: {{jobOrderCityNames}}
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}