Ember.js Ember.NativeArray reverseObjects() Method

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 reverseObjects() method is used reverse object in the array.

Syntax:

reverseObjects( );

Parameters: It doesn’t take any argument.

Return Value: EmberArray receiver.

Steps to Install and Run Ember.js:

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

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 reverseObject1

• app/routes/reverseObject1.js

Javascript

import Route from '@ember/routing/route';

export default class ListRoute extends Route {
    list = [
    "Digital Camera",
    "Speakers",
    "Balloons",
    "Scissors",
    "Cups",
    "Table Confetti",
    "Scissors",
    "Wine",
    "Napkins",
    "Party Plates",
    "Speakers",
    "Music System",
    "Cups",];
    item;
    idx;
    model() {
        return this.list;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('list', this.list);
        controller.set('item', this.item);
        controller.set('idx', this.idx);
    }
}

• app/controllers/reverseObject1.js

Javascript

import Ember from 'ember';
import { reverseObjects, uniq, setObjects, unshiftObject }
    from '@ember/array';

export default Ember.Controller.extend({
    actions: {
        reverse() {
            this.list.setObjects(this.list.reverseObjects());
        },
        remove_d() {
            let k = this.list.uniq();
            this.list.setObjects(k);
        },
        add_first(item) {
            this.list.unshiftObject(item);
        },
    },
});

• app/templates/reverseObject1.hbs

Javascript

{{page-title "reverseObject"}}
<h3>Here is a list of Items: </h3>
<ul>
    {{#each @model as |i|}}
        <li>{{i}}</li>
    {{/each}}
</ul>

<br />
<div>
    <label>Enter Item: </label>
    {{input value=this.item}}
</div>
<div>
    <input
        type="button"
        id="insert-item"
        value="Insert at Begining"
        {{action "add_first" this.item }}
    />
</div>
<br />
<input type="button"
    id="remove-duplicates"
    value="Remove duplicates"
    {{action "remove_d"}} />

<br /><br/>
<input type="button"
    id="reverse_list"
    value="Reverse List"
    {{action "reverse"}} />
{{outlet}}

Output: Visit localhost:4200/reverseObject1 to view the output

Ember.js Ember.NativeArray reverseObjects method

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

ember generate route reverseObject2

• app/routes/reverseObject2.js

Javascript

import Route from '@ember/routing/route';

export default class PartyRoute extends Route {
    partyItems = [
        'Oxygen',
        'Tenet',
        'Source Code',
        'Infine',
        'Loopert',
        'Tenet',
        'SpiderHead',
        'The Thing',
        'A Quiet Place',
        'The Invisible Man',
        'Looper',
        'The Thing',
        'Ad Astra'
    ];
  temp = [
        'Shutter Island',
        'Matrix',
        'Avatar',
        'Fantastic Beast',
        'Avengers',
        'Fantastic four',
        'HulK',
        'Superman',
        'Spiderman',
        'The Batman'
    ];
    item;
    idx;
    model() {
        return this.partyItems;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('partyItems', this.partyItems);
        controller.set('item', this.item);
        controller.set('idx', this.idx);
    controller.set('temp', this.temp);
    }
}

• app/controllers/reverseObject2.js

Javascript

import Ember from 'ember';
import { reverseObjects, unshiftObject, uniq, }
    from '@ember/array';

export default Ember.Controller.extend({
    actions: {
        invert() {
            this.partyItems.reverseObjects( );

        },
        insert_first(data) {
            this.partyItems.unshiftObject(data);
        },
        remove_d() {
            let res = this.partyItems.uniq();
            this.partyItems.setObjects(res)
        },
    },
});

• app/templates/reverseObject2.hbs

Javascript

{{page-title "reverseObject"}}
<h3>Here is a list of items: </h3>
<ul>
    {{#each @model as |party|}}
        <li>{{party}}</li>
    {{/each}}
</ul>
<br /><br />
<div>
    <label>Enter Item: </label>
    {{input value=this.item}}
</div>
<div>
    <input
        type="button"
        id="insert-begining"
        value="Insert at Begining"
        {{action "insert_first" this.item }}
    />
</div>
<br />

<input type="button"
    id="reverse_list"
    value="Reverse List"
    {{action "invert"}} />
<br /><br/>
<input type="button"
    id="remove-duplicates"
    value="Remove duplicates"
    {{action "remove_d"}} />
{{outlet}}

Output: Visit localhost:4200/reverseObject2 to view the output

Ember.js Ember.NativeArray reverseObjects

Reference: https://api.emberjs.com/ember/4.4/classes/Ember.NativeArray/methods/reverseObjects?anchor=reverseObjects