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 map() method is used to map all items in the array with a specific function.
Syntax:
map(callback, target)
Parameters:
- callback: The callback function to execute.
- target: The target object to use.
Return Value: The mapped 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 details
app/routes/details.js
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
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
{{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
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
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
{{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=map