Ember.js Ember.NativeArray forEach() Method

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 forEach() method is used to run a function on every item of the array.

Syntax:

forEach(callback, target)

Parameters:

• callback: The callback function to execute.
• target: The target object to use.

Return Value: The receiver.

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 details

app/routes/details.js

Javascript

import Route from '@ember/routing/route';

export default class DetailsRoute extends Route {
    details = [
        {
            name: 'Anubhav',
            mobile: '1298119967',
            age: 20,
            salary: 10000,
            city: 'Patna',
            country: 'India',
            gender: 'M',
            zipCode: '800020',
        },
        {
            name: 'Sakshi',
            mobile: '1234567890',
            age: 17,
            salary: 2000,
            city: 'Mumbai',
            country: 'India',
            gender: 'F',
            zipCode: '400001',
        },
        {
            name: 'Satyam',
            mobile: '2222222222',
            age: 42,
            salary: 230000,
            city: 'Delhi',
            country: 'India',
            gender: 'M',
            zipCode: '110012',
        },
        {
            name: 'Shivam',
            mobile: '1122113322',
            age: 33,
            salary: 122200,
            city: 'Patna',
            country: 'India',
            gender: 'M',
            zipCode: '530068',
        },
        {
            name: 'Ayushi',
            mobile: '2244668800',
            age: 11,
            salary: 100,
            city: 'Jaipur',
            country: 'India',
            gender: 'F',
            zipCode: '302001',
        },
        {
            name: 'Yeshwant',
            mobile: '1133557799',
            age: 19,
            salary: 5000,
            city: 'Chennai',
            country: 'India',
            gender: 'M',
            zipCode: '600001',
        },
        {
            name: 'Siddhant',
            mobile: '9911000000',
            age: 65,
            salary: 992130,
            city: 'Mangalore',
            country: 'India',
            gender: 'M',
            zipCode: '574142',
        },
        {
            name: 'Khushi',
            mobile: '8888888888',
            age: 10,
            salary: 0,
            city: 'Pune',
            country: 'India',
            gender: 'F',
            zipCode: '111045',
        },
    ];
    model() {
        return this.details;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('details', this.details);
    }
}

app/controllers/details.js

Javascript

import Ember from 'ember';
import { any, slice, reverseObjects, rejectBy }
    from '@ember/array';

export default Ember.Controller.extend({
    actions: {
        getAllNames() {
            let tempItems = this.details.getEach('name');
            let str = '';
            for (let i = 0; i < tempItems.length; i++)
                str += tempItems[i] + '\n';
            alert(str);
        },
        allAdult() {
            let res = this.details.every((person) =>
                person.age > 18);
            alert(`${res ? 'YES' : 'NO'}`);
        },
        getFemale() {
            let tempItems = this.details.filter((person) =>
                person.gender === 'F');
            let str = '';
            for (let i = 0; i < tempItems.length; i++)
                str += tempItems[i].name + '\n';
            alert(str);
        },
        increaseSalary() {
            this.details.forEach((person) =>
                Ember.set(person, 'salary',
                    person.salary + 1000)
            );
        },
        hideNumber() {
            this.details.map((person) => Ember.set
                (person, 'mobile', '**********'));
        },
        clearAll() {
            this.details.clear();
        },
    },
});

app/template/details.hbs

HTML

{{page-title "Details"}}
<h3>List of People: </h3>
<br /><br />
<table>
    <tr>
        <th>Name</th>
        <th>Gender</th>
        <th>Age</th>
        <th>Salary</th>
        <th>Mobile</th>
        <th>City</th>
        <th>Country</th>
        <th>Zip Code</th>
    </tr>
    {{#each @model as |detail|}}
        <tr>
            <td>{{detail.name}}</td>
            <td>{{detail.gender}}</td>
            <td>{{detail.age}}</td>
            <td>{{detail.salary}}</td>
            <td>{{detail.mobile}}</td>
            <td>{{detail.city}}</td>
            <td>{{detail.country}}</td>
            <td>{{detail.zipCode}}</td>
        </tr>
    {{/each}}
</table>
<br /><br />
<input
    type="button"
    id="get-all"
    value="Get All Names"
    {{action "getAllNames"}}
/>
<br /><br />
<input
    type="button"
    id="get-all-adult"
    value="Is there only adult?"
    {{action "allAdult"}}
/>
<br /><br />
<input
    type="button"
    id="get-female"
    value="Get Female"
    {{action "getFemale"}}
/>
<br /><br />
<input
    type="button"
    id="increase-salary"
    value="Increase Salary"
    {{action "increaseSalary"}}
/>
<br /><br />
<input
    type="button"
    id="hide-number"
    value="Hide Number"
    {{action "hideNumber"}}
/>
<br /><br />
<input type="button" id="clear-all"
       value="Clear" {{action "clearAll"}} />

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

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

ember generate route students

app/routes/students.js

Javascript

import Route from '@ember/routing/route';

export default class StudentsRoute extends Route {
   students = [
       {
           name: 'Alix Mainston',
           gender: 'F',
           class: 9,
           grade: 'B',
           pocket_money: 9643,
       },
       {
           name: 'Mufinella Lezemore',
           gender: 'F',
           class: 10,
           grade: 'A',
           pocket_money: 6960,
       },
       {
           name: 'Sibylla Hanbridge',
           gender: 'F',
           class: 8,
           grade: 'D',
           pocket_money: 2272,
       },
       {
           name: 'Wilow Lingwood',
           gender: 'F',
           class: 8,
           grade: 'A',
           pocket_money: 4279,
       },
       {
           name: 'Estele MacIllrick',
           gender: 'M',
           class: 9,
           grade: 'E',
           pocket_money: 2579,
       },
       {
           name: 'Israel Blackaller',
           gender: 'M',
           class: 10,
           grade: 'A',
           pocket_money: 9381,
       },
       {
           name: 'Doralyn Sowerbutts',
           gender: 'F',
           class: 12,
           grade: 'A',
           pocket_money: 4933,
       },
       {
           name: 'Lolly Boynes',
           gender: 'F',
           class: 8,
           grade: 'A',
           pocket_money: 1988,
       },
       {
           name: 'Lucie Janowski',
           gender: 'F',
           class: 11,
           grade: 'F',
           pocket_money: 6185,
       },
       {
           name: 'Camilla Ritelli',
           gender: 'Bigender',
           class: 9,
           grade: 'C',
           pocket_money: 1105,
       },
       {
           name: 'Celene Enticknap',
           gender: 'F',
           class: 9,
           grade: 'A',
           pocket_money: 7186,
       },
       {
           name: 'Hillier Buchanan',
           gender: 'M',
           class: 12,
           grade: 'A',
           pocket_money: 844,
       },
       {
           name: 'Afton Povey',
           gender: 'F',
           class: 9,
           grade: 'F',
           pocket_money: 6633,
       },
       {
           name: 'Flint Chesley',
           gender: 'M',
           class: 9,
           grade: 'B',
           pocket_money: 3835,
       },
       {
           name: 'Sigfrid Copper',
           gender: 'M',
           class: 8,
           grade: 'D',
           pocket_money: 3883,
       },
       {
           name: 'Barry Donnelly',
           gender: 'M',
           class: 12,
           grade: 'C',
           pocket_money: 4521,
       },
       {
           name: 'Buck Polgreen',
           gender: 'M',
           class: 8,
           grade: 'C',
           pocket_money: 553,
       },
   ];
   model() {
       return this.students;
   }
   setupController(controller, model) {
       super.setupController(controller, model);
       controller.set('students', this.students);
   }
}

app/controllers/students.js

Javascript

import Ember from 'ember';

export default Ember.Controller.extend({
    actions: {
        getAllNames() {
            let tempItems = this.students.getEach('name');
            let str = '';
            for (let i = 0; i < tempItems.length; i++)
                str += tempItems[i] + '\n';
            alert(str);
        },
        allPass() {
            let res = this.students.every((student)
                => student.grade != 'F');
            alert(`${res ? 'YES' : 'NO'}`);
        },
        getFemale() {
            let tempItems = this.students.filter((student)
                => student.gender === 'F');
            let str = '';
            for (let i = 0; i < tempItems.length; i++)
                str += tempItems[i].name + '\n';
            alert(str);
        },
        changeGrade() {
            this.students.forEach((student) =>
                Ember.set(student, 'grade', 'A')
            );
        },
        increasePocketMoney() {
            this.students.map((student) =>
                Ember.set(student, 'pocket_money',
                    student.pocket_money + 1000)
            );
        },
    },
});

app/template/students.hbs

HTML

{{page-title "Students"}}
<h3>List of Students: </h3>
<br /><br />
<table>
    <tr>
        <th>Name</th>
        <th>Class</th>
        <th>Gender</th>
        <th>Grade</th>
        <th>Pocket Money</th>
    </tr>
    {{#each @model as |student|}}
        <tr>
            <td>{{student.name}}</td>
            <td>{{student.class}}</td>
            <td>{{student.gender}}</td>
            <td>{{student.grade}}</td>
            <td>{{student.pocket_money}}</td>
        </tr>
    {{/each}}
</table>
<br /><br />
<input
    type="button"
    id="get-all"
    value="Get All Names"
    {{action "getAllNames"}}
/>
<br /><br />
<input
    type="button"
    id="all-pass"
    value="Did Everyone Pass?"
    {{action "allPass"}}
/>
<br /><br />
<input
    type="button"
    id="get-female"
    value="Get Female"
    {{action "getFemale"}}
/>
<br /><br />
<input
    type="button"
    id="increase-pocket-money"
    value="Increase Pocket Money"
    {{action "increasePocketMoney"}}
/>
<br /><br />
<input
    type="button"
    id="change-grade"
    value="Change Grade"
    {{action "changeGrade"}}
/>
{{outlet}}

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

Reference: https://api.emberjs.com/ember/4.6/classes/Ember.NativeArray/methods?anchor=forEach