Ember.js ArrayProxy insertAt() Method
Last Updated :
26 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 insertAt() method is used to insert an object at the specified index.
Syntax:
insertAt( index, object );
Parameters:
- index: It is the index at which place object will insert.
- object: It is an object which will insert.
Return Value: A receiver.
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 insertAt1
app/routes/insertAt1.js
import Route from '@ember/routing/route';
export default class ListRoute extends Route {
list = [1, 2, 3, 5, 6, 7, 8, 9];
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);
}
}
import Ember from 'ember';
import { clear, addObject, indexOf }
from '@ember/array';
export default Ember.Controller.extend({
actions: {
insertItem(ind, item) {
this.list.insertAt(ind, JSON.parse(item));
},
clearList() {
this.list.clear();
},
getIndex(item) {
let res = this.list.indexOf(JSON.parse(item));
res != -1 ? alert(`Index of ${item} is ${res}`)
: alert(`list does not contains ${item}`);
},
},
});
{{page-title "insertAt"}}
<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.item2}}
</div>
<div>
<input
type="button"
id="first-index-item"
value="Get Index"
{{action "getIndex" this.item2}}
/>
</div>
<br />
<div>
<label>Enter Index: </label>
{{input value=this.item}}
</div>
<br />
<div>
<label>Enter Item: </label>
{{input value=this.item3}}
</div>
<div>
<input
type="button"
id="insert-item"
value="Insert Item"
{{action "insertItem" this.item this.item3}}
/>
</div>
<br />
<input type="button" id="clear-items"
value="Clear" {{action "clearList"}} />
{{outlet}}
Output: Visit localhost:4200/insertAt1 to view the output
Ember.js ArrayProxy insertAt method
Example 2: Type the following code to generate the route for this example:
ember generate route insertAt2
app/routes/insertAt2.js
import Route from '@ember/routing/route';
export default class PartyRoute extends Route {
partyItems = [
'Oxygen',
'Source Code',
'Infine',
'Tenet',
'SpiderHead',
'The Thing',
'A Quiet Place',
'The Invisible Man',
'Looper',
'Ad Astra'
];
temp = [
'Shutter Island',
'Matrix',
'Avatar',
'Fantastic Beast',
'Avengers',
'Fantastic four',
'Hult',
'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);
}
}
import Ember from 'ember';
import { indexOf, pushObjects, insertAt } from '@ember/array';
export default Ember.Controller.extend({
actions: {
insertItem(ind, item) {
this.partyItems.insertAt(ind, item);
},
push_item(data) {
this.partyItems.pushObjects(data);
},
getItem(item) {
let res = this.partyItems.indexOf(item);
res != -1 ? alert(`Index of ${item} is ${res}`)
: alert(`list does not contains ${item}`);
},
},
});
{{page-title "insertAt"}}
<h3>Here is a list of items: </h3>
<ul>
{{#each @model as |party|}}
<li>{{party}}</li>
{{/each}}
</ul>
<br /><br />
<div>
<label>Enter Index: </label>
{{input value=this.item}}
</div>
<br />
<div>
<label>Enter Item: </label>
{{input value=this.item2}}
</div>
<div>
<input
type="button"
id="insert-item"
value="Insert Item"
{{action "insertItem" this.item this.item2}}
/>
</div>
<br />
<div>
<label>Enter Item: </label>
{{input value=this.item3}}
</div>
<div>
<input
type="button"
id="contains-item"
value="Get Index"
{{action "getItem" this.item3}}
/>
</div>
<br />
<input
type="button"
id="contains-item"
value="Add Movies"
{{action "push_item" this.temp}}
/>
{{outlet}}
Output: Visit localhost:4200/insertAt2 to view the output
Ember.js ArrayProxy insertAt method
Reference: https://api.emberjs.com/ember/4.6/classes/ArrayProxy/methods/invoke?anchor=insertAt