Ember.js Ember.NativeArray [] Property
Last Updated :
27 Sep, 2022
Ember.js is an open-source JavaScript framework used for developing large client-side web applications which is based on Model-View-Controller (MVC) architecture. Ember.js is one of the most widely used front-end application frameworks. It is made to speed up development and increase productivity. Currently, it is utilized by a large number of websites, including Square, Discourse, Groupon, Linked In, Live Nation, Twitch, and Chipotle.
The [] property is used to get or set the array content.
Syntax:
array[]
Step 1: To run the following examples you will need to have an ember project with you. To create one, you will need to install ember-cli first. Write the below code in the terminal:
npm install ember-cli
Step 2: Now you can create the project by typing in the following piece of code:
ember new <project-name> --lang en
To start the server, type:
ember serve
Example 1: Type the following code to generate the route for this example:
ember generate route richest-people
app/routes/richest-people.js
import Route from '@ember/routing/route';
import { sortBy } from '@ember/array';
export default class RichestPeopleRoute extends Route {
richestPeople = [
{ 'name': 'mukesh ambani', 'net-worth': 90.7 },
{ 'name': 'jeff Bezos', 'net-worth': 148.1 },
{ 'name': 'Warren Buffet', 'net-worth': 99.3 },
{ 'name': 'Bill gates', 'net-worth': 104.7 },
{ 'name': 'elon Musk', 'net-worth': 253.4 },
{
'name': 'gautam adani and family',
'net-worth': 115.8
},
{ 'name': 'Larry Page', 'net-worth': 93.4 },
{ 'name': 'larryEllison', 'net-worth': 103.3 },
{ 'name': 'sergeyBrin', 'net-worth': 89.9 },
{
'name': 'bernard Arnault and family',
'net-worth': 157.1
},
];
firstPerson;
lastPerson;
idx = 5;
randomPerson;
num;
model() {
this.richestPeople =
this.richestPeople.sortBy('net-worth');
this.randomPerson = this.richestPeople[this.idx - 1];
return this.richestPeople;
}
setupController(controller, model) {
this._super(controller, model);
controller.set('idx', this.idx);
controller.set('firstPerson',
this.richestPeople.firstObject);
controller.set('lastPerson',
this.richestPeople.lastObject);
controller.set('randomPerson',
this.randomPerson);
controller.set('richestPeople',
this.richestPeople);
controller.set('num', this.richestPeople.length);
}
}
import Ember from 'ember';
export default Ember.Controller.extend({
actions: {
setIdx(n) {
this.idx = parseInt(n);
this.set('randomPerson',
this.richestPeople[this.idx - 1]);
}
}
})
{{page-title "Richest People"}}
<div>
<label>Enter Value (1-{{this.num}}):</label>
{{input value=this.idx}}
</div>
<div>
<input type="button" id="fetch"
value="Fetch" {{action "setIdx" this.idx}} />
</div>
<br />
<div>First Person on the List:
{{this.firstPerson.name}}
${{this.firstPerson.net-worth}}
B
</div>
<br />
<div>Last Person on the List:
{{this.lastPerson.name}}
${{this.lastPerson.net-worth}}
B
</div>
<br />
<div>Random Person on the List:
{{this.randomPerson.name}}
${{this.randomPerson.net-worth}}
B
</div>
{{outlet}}
Output: Visit localhost:4200/richest-people to view the output:
Â
Example 2: Type the following code to generate the route for this example:
ember generate route notepad
app/routes/notepad.js
import Route from '@ember/routing/route';
export default class NotepadRoute extends Route {
items = [];
empty = true;
item;
firstItem;
lastItem;
randomItem;
num;
model() {
this.firstItem = this.items.firstObject;
this.lastItem = this.items.lastObject;
this.num = this.items.length;
return this.items;
}
setupController(controller, model) {
this._super(controller, model);
controller.set('items', this.items);
controller.set('empty', this.empty);
controller.set('firstItem', this.firstItem);
controller.set('lastItem', this.lastItem);
controller.set('randomItem', this.randomItem);
controller.set('num', this.num);
}
}
import Ember from "ember";
import { pushObject } from "@ember/array";
export default Ember.Controller.extend({
actions: {
addItem(item) {
this.items.pushObject(item);
this.set("empty", false);
this.set("firstItem", this.items.firstObject);
this.set("lastItem", this.items.lastObject);
this.set("num", this.items.length);
this.set("randomItem", this.items[
Math.floor(Math.random() * this.num)]);
},
},
});
{{page-title "Notepad"}}
<h2>Notepad</h2>
<div>
<label>Enter Item: </label>
{{input value=this.item}}
</div>
<div>
<input
type="button"
id="add-item"
value="Add Item"
{{action "addItem" this.item}}
/>
</div>
<br /><br />
{{#if this.empty}}
<div>The list is empty!</div>
{{else}}
<div>
<div>First Item: {{this.firstItem}}</div>
<div>Latest Item: {{this.lastItem}}</div>
<div>Random Item: {{this.randomItem}}</div>
<div>Number of Items: {{this.num}}</div>
</div>
{{/if}}
<br />
<br />
{{outlet}}
Output: Visit localhost:4200/notepad to view the output:
Â
Reference: https://api.emberjs.com/ember/4.6/classes/Ember.NativeArray/properties/