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);
}
}
|
app/templates/add-objects.hbs
{{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);
}
}
|
app/controllers/compact2.js
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' ));
},
},
});
|
app/template/compact2.hbs
{{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
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