Ember.js ArrayProxy reject() Method
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 reject() method is used to get all the items of the array which return false against the function in the enumeration.
Syntax:
reject( callback, target );
Parameters:
- callback: It is the callback to execute on each item of the array.
- target: It is the array item for which the callback will invoke.
Return Value: A rejected value.
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 server
Example 1: Type the following code to generate the route for this example:
ember generate route reject1
app/routes/reject1.js
import Route from '@ember/routing/route' ; export default class ListRoute extends Route { list = [1, 2, 3, 5, 6, 7, 8, 9]; list1 = [21, 24, 12, 22, 26, 12]; 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); controller.set( 'list1' , this .list1); } } |
app/controllers/reject1.js
import Ember from 'ember' ; import { pushObject, pushObjects, reduce, reject, removeAt, removeObject } from '@ember/array' ; export default Ember.Controller.extend({ actions: { insertItem(item) { this .list.pushObject(JSON.parse(item)); }, insertItems() { this .list.pushObjects( this .list1); }, sumItems() { let ans = this .list.reduce((acc, curr) => acc += curr); alert(ans) }, printItems() { let ans = this .list.reject((numb) => numb % 2 != 1); alert(ans.join( '\n' )) }, removeItem(data) { this .list.removeAt(JSON.parse(data)); }, removeObject(data) { this .list.removeObject(JSON.parse(data)); }, }, }); |
app/templates/reject1.hbs
{{page-title "reject" }} <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 .item3}} </div> <div> <input type= "button" id= "insert-item" value= "Insert Item" {{action "insertItem" this .item3}} /> </div> <br /> <div> <label>Enter Item: </label> {{input value= this .item2}} </div> <div> <input type= "button" id= "remove-Object" value= "Remove Item" {{action "removeObject" this .item2}} /> </div> <br /> <div> <label>Enter Index: </label> {{input value= this .item}} </div> <div> <input type= "button" id= "remove-item" value= "Remove Item at Index" {{action "removeItem" this .item}} /> </div> <br /> <div> <input type= "button" id= "print-item" value= "Print Event Numbers" {{action "printItems" }} /> </div><br /> <div> <input type= "button" id= "push-items" value= "Insert more items" {{action "insertItems" }} /> </div> <br /> <div> <input type= "button" id= "sum-item" value= "Total sum" {{action "sumItems" }} /> </div> {{outlet}} |
Output: Visit localhost:4200/reject1 to view the output:
Example 2: Type the following code to generate the route for this example:
ember generate route reject2
app/routes/reject2.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); } } |
app/controllers/reject2.js
import Ember from 'ember' ; import { pushObject, reduce, reject, removeAt, removeObject, pushObjects} from '@ember/array' ; export default Ember.Controller.extend({ actions: { insertItem(item) { this .partyItems.pushObject(item); }, push_item(data) { this .partyItems.pushObjects(data); }, print_item() { let ans = this .partyItems.reduce((acc, curr)=> acc+= '\n' +curr); alert(ans) }, searchItem(data) { let ans = this .partyItems.reject((movie)=> movie.slice(0,1)!=data); alert(ans.join( '\n' )) }, removeItem(data) { this .partyItems.removeObject(data); }, removeItemAt(data) { this .partyItems.removeAt(JSON.parse(data)); }, }, }); |
app/templates/reject2.hbs
{{page-title "reject" }} <h3>Here is a list of items: </h3> <ul> {{ #each @model as |party|}} <li>{{party}}</li> {{/each}} </ul> <br /> <div> <label>Enter character: </label> {{input value= this .item}} </div> <div> <input type= "button" id= "search-item" value= "Search Movie Name Start with latter" {{action "searchItem" this .item}} /> </div> <br /> <div> <label>Enter Index: </label> {{input value= this .item4}} </div> <div> <input type= "button" id= "remove-item-At" value= "Remove Movie At index" {{action "removeItemAt" this .item4}} /> </div> <br /> <div> <label>Enter Item: </label> {{input value= this .item3}} </div> <div> <input type= "button" id= "remove-item" value= "Remove Movie" {{action "removeItem" this .item3}} /> </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 .item2}} /> </div> <br /> <input type= "button" id= "contains-item" value= "Add Movies" {{action "push_item" this .temp}} /> <br /><br /> <input type= "button" id= "show-item" value= "List All Movies" {{action "print_item" }} /> {{outlet}} |
Output: Visit localhost:4200/reject2 to view the output
Reference: https://api.emberjs.com/ember/2.14/classes/Ember.Array/methods/reject?anchor=reject
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