Open In App

Ember.js EmberArray filter() Method

Improve
Improve
Like Article
Like
Save
Share
Report

Ember.js is an open-source JavaScript framework used for developing large client-side web applications which is 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 filter() is used to get a filtered array with items that return true for the provided callback function. 

Syntax:

filter( callback, target );

Parameters:

  • callback: It is the callback function that will be applied to each item of the array.
  • target:  It is the object in which the callback function will apply.

Return Value: It returned the filtered array.

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 filter1

app/routes/filter1.js




import Ember from "ember";
import { filter } from "@ember/array";
  
export default Ember.Controller.extend({
    actions: {
        allPass() {
            let ans = '';
            let temp = this.students.filter((item) =>
            item.grade == 'F');
            for (let i = 0; i < temp.length; i++)
                ans += temp[i].name + '\n';
            alert(ans);
        },
        allFemale() {
            let ans = '';
            let temp = this.students.filter((item) =>
            item.gender == 'F');
            for (let i = 0; i < temp.length; i++)
                ans += temp[i].name + '\n';
            alert(ans);
        },
        allClass(data) {
            let ans = '';
            let temp = this.students.filter((item) => 
            item.class == JSON.parse(data));
            for (let i = 0; i < temp.length; i++)
                ans += temp[i].name + '\n';
            alert(ans);
        },
    }
});


app/controllers/filter1.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/templates/filter1.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/filter1 to view the output

Ember.js EmberArray filter method

Example 2: Type the following code to generate the route for this example:

ember generate route filter2

app/routes/filter2.js




import Route from '@ember/routing/route';
import { } from '@ember/array';
  
export default class FruitsRoute extends Route {
    fruits = [
        {
            name: 'Lady Finger',
            isFruit: false,
            color: 'green',
        },
        {
            name: 'Tomato',
            isFruit: false,
            color: 'red',
        },
        {
            name: 'Apple',
            isFruit: true,
            color: 'red',
        },
        {
            name: 'Potato',
            isFruit: false,
            color: 'brown',
        },
        {
            name: 'Mango',
            isFruit: true,
            color: 'yellow',
        },
        {
            name: 'Bannana',
            isFruit: true,
            color: 'yellow',
        },
        {
            name: 'Cabbage',
            isFruit: false,
            color: 'green',
        },
        {
            name: 'Orange',
            isFruit: true,
            color: 'orange',
        },
    ];
    temp1 = ['name', 'isFruit', 'color'];
    temp2;
    model() {
        return this.fruits;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('fruits', this.fruits);
        controller.set('temp1', this.temp1);
        controller.set('temp2', this.temp2);
    }
}


app/controllers/filter2.js




import Ember from 'ember';
  
export default Ember.Controller.extend({
    vehicle: null,
    vehicles: Ember.String.w('Tesla Chrysler Toyota'),
    actions: {
        selectattr(temp) {
            this.set('temp', temp);
        },
        filter_Data(data, data1) {
            if (data == 'isFruit') {
                let ans = this.fruits.filter((item) =>
                item[data] == JSON.parse(data1));
                let temp = '';
                for (let i = 0; i < ans.length; i++)
                    temp += (ans[i].name + '\n')
                alert(temp);
            } else {
                let ans = this.fruits.filter((item) => 
                item[data] == data1);
                alert(JSON.stringify(ans));
            }
        },
    },
});


app/templates/filter2.hbs




{{page-title "Is-Fruits"}}
<h3>List of Items in Bucket: </h3>
<br /><br />
<table>
    <tr>
        <th>Name</th>
           <th>IsFruit</th>
        <th>color</th>
      </tr>
    {{#each @model as |detail|}}
    <tr>
        <td>{{detail.name}}</td>
          <td>{{detail.isFruit}}</td>
          <td>{{detail.color}}</td>
    </tr>
      {{/each}}
</table>
<br />
<div>
    <label>Select Attribute: </label>
      <select onchange={{action "selectattr" 
        value="target.value"}}>
    {{#each this.temp1 as |attribute|}}
        <option value={{attribute}}>
            {{attribute}}
        </option>
    {{/each}}
    </select>
</div>
<br />
<div>
    <label>Enter value for Attribute: </label>
      {{input value=this.temp2}}
</div>
<div>
    <input
        type="button"
        id="check-fruit"
        value="Filter Data"
        {{action "filter_Data" this.temp this.temp2}}
      />
</div>
  
{{outlet}}


Output: Visit localhost:4200/filter2 to view the output

Ember.js EmberArray filter method

Reference: https://api.emberjs.com/ember/4.6/classes/EmberArray/methods/filter?anchor=filter



Last Updated : 19 Sep, 2022
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads