Teste de histogram

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  histogram: [{1: 4}, {2: 10}, {3: 2425}, {4: 2}, {5: 294}]
});

helpers.sum.js

import { helper } from '@ember/component/helper';

export function sum(params) {
  return params.reduce((a, b) => {
    return a + b;
  });
};

export default helper(sum);

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>


{{#each histogram as |item index|}}
  {{sum index 1}} - {{get item (sum index 1)}}<br>
{{/each}}

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"
  }
}