Ember.js Ember.NativeArray popObject() Method

Last Updated : 08 Nov, 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 popObject() method is used to pop objects from an array.

Syntax:

popObject()

Returns: Object popped

Steps to Install and Run Ember.js:

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 notepad

app/routes/notepad.js

Javascript

import Route from '@ember/routing/route';
 
export default class NotepadRoute extends Route {
    items = ['Bread', 'Facewash', 'Egg', 'Pen', 'Medicine'];
    model() {
        return this.items;
    }
    setupController(controller, model) {
        this._super(controller, model);
        controller.set('items', this.items);
    }
}

app/controllers/notepad.js

Javascript

import Ember from 'ember';
import { popObject } from '@ember/array';
 
export default Ember.Controller.extend({
    actions: {
        removeItem() {
            if (this.items.length == 0)
                alert('Item List is Empty');
            this.items.popObject();
        }
    }
})

app/template/notepad.hbs

HTML

{{page-title "Notepad"}}
<h2>Your Items</h2>
<ul>
    {{#each @model as |i|}}
        <li>{{i}}</li>
      {{/each}}
</ul>
<br /><br />
<div>
    <input
        type="button"
        id="remove-item"
        value="Remove Item"
        {{action "removeItem"}}
      />
</div>
{{outlet}}

Output: Visit localhost:4200/notepad to view the output

Example 2: Type the following code to generate the route for this example:

ember generate route richest-people

app/routes/richest-people.js

Javascript

import Route from '@ember/routing/route';
import { classify, w } from '@ember/string';
 
export default class RichestPeopleRoute extends Route {
    richestPeople = ['elon Musk', 'bernard Arnault and family',
        'jeff Bezos', 'Bill gates', 'gautam adani and family',
        'Larry Page', 'Warren Buffet', 'larry Ellison',
        'mukesh ambani', 'sergey brin'];
    num = 10;
    init() {
        this.richestPeople = this.richestPeople.map(classify);
    }
    model() {
        this.init();
        return this.richestPeople;
    }
    setupController(controller, model) {
        this._super(controller, model);
        controller.set('num', this.num);
        controller.set('richestPeople', this.richestPeople)
    }
}

app/controllers/richest-people.js

Javascript

import Ember from 'ember';
import { popObject } from '@ember/array';
 
export default Ember.Controller.extend({
   actions: {
       set(n) {
           this.num = parseInt(n);
           while (this.richestPeople.length > this.num) {
               this.richestPeople.popObject();
           }
       }
   }
})

app/template/richest-people.hbs

HTML

{{page-title "Richest People"}}
<div>
    <label>Enter Value: </label>
      {{input value=this.num}}
</div>
<div>
    <input type="button" id="fetch"   
        value="Fetch" {{action "set" this.num}} />
</div>
<br /><br />
<h2>Top {{this.num}} Richest People in the World</h2>
<ul>
    {{#each @model as |rich-person|}}
        <li>{{rich-person}}</li>
      {{/each}}
</ul>
{{outlet}}