Ember.js EmberArray filterBy() Method
Ember.js is an open-source JavaScript framework used for developing large client-side web applications 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 filterBy() method is used to filter the array by the property and optional value.
Syntax:
filterBy( key, value );
Parameters:
- key: It is the property name that we have to test.
- value: It is the value against the property which we have to test.
Return Value: The filtered array.
Steps to Install and Run Ember.js:
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
Step 2: 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 filter-by1
app/routes/filter-by1.js
import Route from '@ember/routing/route' ; export default class WebsitesRoute extends Route { food = [ { food: 'apple' , isFruit: true , Bucket: '1' , }, { food: 'Potato' , isFruit: false , Bucket: '2' , }, { food: 'Banana' , isFruit: true , Bucket: '1' , }, { food: 'Burgur' , isFruit: false , Bucket: '2' , }, { food: 'Orange' , isFruit: true , Bucket: '1' , }, { food: 'sandwitch' , isFruit: false , Bucket: '2' , }, { food: 'bean' , isFruit: false , Bucket: '2' , }, ]; temp; model() { return this .food; } setupController(controller, model) { super .setupController(controller, model); controller.set( 'food' , this .food); controller.set( 'temp' , this .temp); controller.set( 'temp2' , this .temp2); } } |
app/controllers/filter-by1.js
import Ember from 'ember' ; export default Ember.Controller.extend({ actions: { Select(data1) { let temp = this .food. filterBy( 'Bucket' , data1); let ans = '' ; for (let i = 0; i < temp.length; i++) ans += temp[i].food + '\n' ; alert(ans); }, allFruit() { let temp = this .food. filterBy( 'isFruit' ); let ans = '' ; for (let i = 0; i < temp.length; i++) ans += temp[i].food + '\n' ; alert(ans); }, nonFruit() { let temp = this .food. filterBy( 'isFruit' , false ); let ans = '' ; for (let i = 0; i < temp.length; i++) ans += temp[i].food + '\n' ; alert(ans); }, }, }); |
app/templates/filter-by1.hbs
{{page-title "filterBy" }} <h3>Websites</h3> <br /><br /> <table> <tr> <th> Food Name </th> <th>Bucket </th> <th>Fruit </th> </tr> {{ #each @model as |website|}} <tr> <td>{{website.food}}</td> <td>{{website.Bucket}}</td> <td>{{website.isFruit}}</td> </tr> {{/each}} </table> <br /><br /> <input type= "button" id= "all-Fruits" value= "All Fruit" {{action "allFruit" }} /> <br /><br /> <input type= "button" id= "BucketNo" value= "All items except fruits" {{action "nonFruit" }} /> <br /><br /> <div> <label>Enter Bucket Number : </label> {{input value= this .temp2}} </div> <input type= "button" id= "all-Fruits" value= "All Fruit" {{action "Select" this .temp2}} /> {{outlet}} |
Output: Visit localhost:4200/filter-by1 to view the output
Example 2: Type the following code to generate the route for this example:
ember generate route filter-by2
app/routes/filter-by2.js
import Route from '@ember/routing/route' ; export default class StudentsRoute extends Route { students = [ { name: 'Aakash' , gender: 'M' , class: 10, grade: 'A' , }, { name: 'Soniya' , gender: 'F' , class: 8, grade: 'C' , }, { name: 'Sita' , gender: 'F' , class: 10, grade: 'A' , }, { name: 'Ram' , gender: 'M' , class: 10, grade: 'A' , }, { name: 'Esnoor' , gender: 'M' , class: 9, grade: 'C' , }, { name: 'Isha' , gender: 'F' , class: 19, grade: 'B' , }, { name: 'Doman' , gender: 'M' , class: 12, grade: 'B' , }, { name: 'Lolu' , gender: 'M' , class: 10, grade: 'A' , }, { name: 'Lucky' , gender: 'M' , class: 11, grade: 'F' , }, { name: 'Neha' , gender: 'F' , class: 10, grade: 'B' , }, { name: 'Balit' , gender: 'M' , class: 12, grade: 'F' , }, { name: 'Hillier Buchanan' , gender: 'M' , class: 12, grade: 'A' , }, { name: 'Aman' , gender: 'M' , class: 11, grade: 'B' , }, { name: 'Anuj' , gender: 'M' , class: 12, grade: 'F' , }, { name: 'Satyam' , gender: 'M' , class: 12, grade: 'F' , }, { name: 'Aayush' , gender: 'M' , class: 12, grade: 'C' , }, ]; temp2; model() { return this .students; } setupController(controller, model) { super .setupController(controller, model); controller.set( 'students' , this .students); controller.set( 'temp2' , this .temp2); } } |
app/controllers/filter-by2.js
import Ember from 'ember' ; export default Ember.Controller.extend({ actions: { allPass() { let temp = this .students. filterBy( 'grade' , 'F' ); let ans = '' ; for (let i = 0; i < temp.length; i++) ans += temp[i].name + '\n' ; alert(ans); }, allFemale() { let temp = this .students. filterBy( 'gender' , 'F' ); let ans = '' ; for (let i = 0; i < temp.length; i++) ans += temp[i].name + '\n' ; alert(ans); }, allClass() { let temp = this .students. filterBy( 'class' , JSON.parse( this .temp2)); let ans = '' ; for (let i = 0; i < temp.length; i++) ans += temp[i].name + '\n' ; if (temp.length) { alert(`Students from class ${ this .temp2} are : \n${ans}`); } else { alert(`No student are from class ${ this .temp2}`); } }, }, }); |
app/templates/filter-by2.hbs
{{page-title "Students" }} <h3>List of Students: </h3> <br /><br /> <table> <tr> <th>Name</th> <th>Class</th> <th>Gender</th> <th>Grade</th> </tr> {{ #each @model as |student|}} <tr> <td>{{student.name}}</td> <td>{{student.class}}</td> <td>{{student.gender}}</td> <td>{{student.grade}}</td> </tr> {{/each}} </table> <br /> <input type= "button" id= "all-pass" value= "Failed Student" {{action "allPass" }} /> <br /><br /> <input type= "button" id= "all-female" value= "All are Female" {{action "allFemale" }} /> <br /><br /> <div> <label>Enter Class: </label> {{input value= this .temp2}} </div> <br /> <input type= "button" id= "all-class" value= "All are in Same class" {{action "allClass" this .temp2}} /> {{outlet}} |
Output: Visit localhost:4200/filter-by2 to view the output
Reference: https://api.emberjs.com/ember/4.6/classes/EmberArray/methods/filter?anchor=filterBy