Ember.js MutableArray compact() Method
Last Updated :
08 Sep, 2022
Ember.js is an open-source JavaScript framework used for developing large client-side web applications which are 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 compact() method is used to make a copy of an array without null and undefined elements.
Syntax:
compact( Array );
Property:
- Array: It is the array from which we have to make an array without null and undefined.
Return: It returns an array without null and undefined element.
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
Now you can create the project by typing in the following piece of code:
ember new <project-name> --lang en
Step 2: To start the server, type:
ember serve
Example 1: Type the following code to generate the route for this example:
ember generate route compact1
app/routes/compact1.js
import Route from '@ember/routing/route';
import { classify, w } from '@ember/string';
export default class RichestPeopleRoute extends Route {
richestPeople = [
'elon Musk',
undefined,
'bernard Arnault and family',
null,
'jeff Bezos',
'Bill gates',
'gautam adani and family',
'Larry Page',
undefined,
'Warren Buffet',
'larry Ellison',
'mukesh ambani',
null,
'sergey brin',
];
init() {
super.init(...arguments);
this.richestPeople = this.richestPeople.compact();
}
model() {
this.init();
return this.richestPeople;
}
setupController(controller, model) {
super.setupController(controller, model);
controller.set('num', this.num);
controller.set('richestPeople', this.richestPeople);
}
}
{{page-title "Richest People"}}
<h2>Top Richest People in the World</h2>
<ul>
{{#each @model as |rich-person|}}
<li>{{rich-person}}</li>
{{/each}}
</ul>
{{outlet}}
Output: Visit localhost:4200/compact1 to view the output
Ember.js MutableArray compact
Example 2: Type the following code to generate the route for this example:
ember generate route compact2
app/routes/compact2.js
import Route from '@ember/routing/route';
export default class NotepadRoute extends Route {
items = [
'Bread',
'Facewash',
null,
undefined,
null,
'Egg',
'Pen',
'Medicine',
];
model() {
return this.items;
}
setupController(controller, model) {
super.setupController(controller, model);
controller.set('items', this.items);
}
}
import Ember from 'ember';
import { popObject } from '@ember/array';
export default Ember.Controller.extend({
actions: {
removeItem() {
let ans = this.items.compact();
alert(ans.join('\n'));
},
},
});
{{page-title "compact"}}
<h2>Your Items</h2>
<ul>
{{#each @model as |i|}}
{{#if i}}
<li>{{i}}</li>
{{else}}
<li><b>undefined</b></li>
{{/if}}
{{/each}}
</ul>
<br /><br />
<div>
<input
type="button"
id="remove-item"
value="Remove Item"
{{action "removeItem"}}
/>
</div>
{{outlet}}
Output: Visit localhost:4200/compact2 to view the output
Ember.js MutableArray compact
Reference: https://api.emberjs.com/ember/4.4/classes/MutableArray/methods/compact?anchor=compact