Editing array of strings

controllers.application.js

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

export default Ember.Controller.extend({
  primitiveFruits: ['banana' ,'apple'],
  wrappedFruits: [{name: 'banana'}, {name: 'apple'}],
 
  printPrimitiveFruits() {
    console.log(this.get('primitiveFruits'));
  },
  printWrappedFruits() {
  	console.log(this.get('wrappedFruits').mapBy('name'));
  },
  updateValue(index, {target: {value} }){
    this.primitiveFruits[index] = value;
    set(this, 'primitiveFruits', [...this.primitiveFruits]); 
  }  
 });

templates.application.hbs

<h1>Change some fruits</h1>
<h2>Using the text inputs I want to edit the contents of the fruits array</h2>
<h3>Using primitives 👎</h3>
{{#each primitiveFruits key="@index" as |fruit index|}}
  {{fruit}}
  <input type="text" value={{fruit}} onkeyup={{action this.updateValue index}}>
{{/each}}   
<button {{action printPrimitiveFruits}}>Print</button>
<br />
<h3>As properties of an object 👍</h3>
{{#each wrappedFruits as |fruit|}}
  {{fruit.name}}
  {{input value=fruit.name}}
{{/each}}
<button {{action printWrappedFruits}}>Print</button>

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",
    "ember-composable-helpers": "3.1.0"      
  }
}