Trending March 2024 # Getters And Setters In Javascript Classes? # Suggested April 2024 # Top 4 Popular

You are reading the article Getters And Setters In Javascript Classes? updated in March 2024 on the website Achiashop.com. We hope that the information we have shared is helpful to you. If you find the content interesting and meaningful, please share it with your friends and continue to follow and support us for the latest updates. Suggested April 2024 Getters And Setters In Javascript Classes?

In this article we are going to discuss about the getters and setters in JavaScript classes with suitable examples in JavaScript.

In JavaScript, getters and setters are the methods that are used to get or set the value for properties. When using getters and setters, you can ensure higher data quality. Getters and Setters provide a simplified syntax for an object’s properties and methods. Getters and Setters are used for Data Encapsulation. To add getters and setters in the class, use the get and set keywords.

To get a better understanding let’s look into the syntax and usage of both getters and setters method in JavaScript.

Using Getters method

Getter is a method that is used to retrieve a value of a property. The syntax for the getter method is −

get methodName(){…}

The return type for this method is a value which can be any primitive data type.

Example 1

This is an example program defining the usage of getter method in JavaScript.

const student = { student1 : [‘Ram’, ‘Computer Science’, 022], get details() { return this.student1[0]+’ has registered for the course ‘+this.student1[1]+’ with the roll no. ‘+this.student1[this.student1.length-1]; } } document.getElementById(“result”).innerHTML = student.details;

On executing the above code, the below output is generated.

Example 2

This is an example program defining use of getter method and deleting a particular getter method.

class Maths { static get PIvalue() { return 3.14; } } Maths.PIvalue = 3.14159265; document.getElementById(“result”).innerHTML = Maths.PIvalue; delete Maths.PIvalue; document.getElementById(“result2”).innerHTML = Maths.PIvalue;

On executing the above code, the below output is generated.

Using Setters method

Setter is a method that is used to set the value for a property. The syntax to represent a setter method is −

set MethodName(value){…}

Tha parameter value can be of any primitive data type.

Example 1

This is an example program defining the use of setter methods in JavaScript.

var Employee = { Name: “Rahul”, desg : ‘Software Engineer’, Company : “Google”, set setName(Name) { chúng tôi = Name; }, set setDesignation(desg) { this.Designation = desg; }, get getname() { return this.Name; }, get getDesignation() { return this.desg; } }; Employee.setName = ‘Mohan’; Employee.setDesignation = ‘Web Developer’;

On executing the above code, the below output is generated.

Example 2

This is an example program for the usage of setter method and to delete a particular setter method.

var Employee = { set setName(Name) { chúng tôi = Name; }, set setDesignation(desg) { this.Designation = desg; }, get getname() { return this.Name; }, get getDesignation() { return this.desg; } }; Employee.setName = ‘Mohan’; Employee.setDesignation = ‘Web Developer’; delete Employee.setDesignation;

On executing the above code, the below output is generated.

You're reading Getters And Setters In Javascript Classes?

9 Best Gmat Online Coaching And Classes (2023)

GMAT Online Prep Course is a resource available on the internet that helps you to prepare for the Graduate Management Admission Test. It enables you to improve your writing, analytical, quantitative, reading, and verbal skills.

Top Pick

Magoosh GMAT

Magoosh is a website that enables you to watch video lessons, review GMAT course material, and take practice quizzes with ease. Students can enroll in this course and get 1 year of access to more than 300 lessons with 1,300+ practice questions.

Learn More

Best GMAT Prep Courses and Online Coaching (India & US)

Following is a handpicked list of Best GMAT Prep Courses Online, with their popular features, price, and website links. The list contains Top Online GMAT Preparation Courses:

Magoosh is a website that enables you to watch video lessons, review GMAT course material, and take practice quizzes with ease. Students can enroll in this course and get 1 year of access to more than 300 lessons with 1,300+ practice questions.

Magoosh staff provides written as well as video explanations to make sure the concepts are clearly explained. It gives prompt responses to student’s questions.

👍 Pros 👎 Cons

It is user friendly. Fewer practice tests.

The personalized study compared to the classroom. It has a lake of expert guidance.

Provides suggested questions depend on the answer of previous questions.

One full year access to the study course.

Princeton Review is a GMAT prep course that offers more than 700 GMAT programs. It provides live instruction, adaptive practice tests, interactive video lessons, and more. You can enroll in the courses and get access to high scoring GMAT teachers.

Princeton Review has test-taking strategies and online tool that helps you to get a better score. It contains a library of supplementary GMAT materials. The courses offered by this site include private tutor for each student.

👍 Pros 👎 Cons

It provides full-length practice tests. Lack of mobile study app.

The experts give feedback on the essay you have written. The uneven quality of live instruction.

It offers video explanations for each question.

Enables you to understand your strengths and weakness by structuring your study.

Target Test Prep is a site for learning online GMAT courses that offer a personalized study plan. It has a unique strategy, techniques, and tools to get a high score with ease.

Target Test Prep provides more than 1000 GMAT practice questions. The site helps you to learn through every step of the study process. It offers in-depth lectures and error trackers that enable you to improve your score.

👍 Pros 👎 Cons

It provides live online supports. It only covers the quantitative section of GMAT.

The site offers a custom test creation tool. The practice question test does not provide an adaptive question format.

It has an interactive study calendar.

Target Test Prep contains Templates for note-taking.

Kaplan is a GMAT course study site that offers 30+ hours of live stream class. It is one of the best GMAT prep course site that enables you to boost your score faster without any hassle. It provides 1-on-1 teaching from a tutor.

Kaplan provides interactive learning that lets you engage with teachers. The platform has practice questions and GMAT preparation books. This study site includes more than 9 full-length practice tests.

👍 Pros 👎 Cons

It provides high-quality practice questions. Access to online content which can expire after six months.

It helps you to track your work progress with smart reports.

Courses are well structured.

PrepScholar GMAT is a website that helps you to customize your learning according to your strengths and weakness. It offers both verbal and quantitative sections of the test.

This platform offers weekly reports, customized feedback, progress trackers, and more. The curriculum available in this site is designed according to your study level. The courses of PrepScholar GMAT can be accessed from a laptop, PC, or tablet.

👍 Pros 👎 Cons

Provides interactive videos for learning. Provides only four months of access.

It offers detailed answers of questions. It offers a lower number of questions compared to other courses.

6) examPAL GMAT

ExamPAL has three methods that students can utilize to answer questions related to GMAT. 1) Precise, 2) Alternative, and 3) Logical. Precise is a way of answering questions without checking the choices of answers. Alternative is the elimination process in which plugging the choices of answer. Logical describe contextual information for accessing the statement.

ExamPAL course utilizes video lessons with a unique PALgorithm. The lessons available in this site contains questions with detailed explanation.

👍 Pros 👎 Cons

It provides a free trial. It does not offer live instructions.

This GMAT online coaching course gives personalized feedback. The course does not offer a mobile app.

It offers interactive video lessons.  

You can get guidance from admission comity.  

7) Manhattan Prep GMAT

Manhattan Prep is a study site that offers live and in-depth GMAT classes. It is one of the best GMAT preparation online that enables you to learn the subjects at your grasping level. This website offers a day workshop that helps you to be prepared for GMAT.

Manhattan Prep enables you to customize the learning experience. It offers complete intensive courses that are paired with one to one support of mentors.

👍 Pros 👎 Cons

It provides in-depth instruction about one specific part of the exam. You need to renew the subscription every year.

You can get access to six full-length adaptive practice tests. The curriculum can be redundant for those who are already good at setting the strategy.

It enables you to learn any subject from the mobile app.  

Manhattan offers MBA admission guidance.  

8) Veritas

Veritas is a platform that helps you prepare for the GMAT exam. It provides live instructor help for all 7 days of the week. This site has a computer-adaptive system that is validated by industry experts.

Veritas Prep contains more than 12 GMAT practice tests. This website includes an easy to view interactive video lessons. It enables you to study at your own speed.

👍 Pros 👎 Cons

It provides good teaching material. There is a limit on class timing.

This application offers a flexible learning experience.  

It offers 1 year of full access.  

Veritas Prep enables you to know your progress in tackling the questions.  

9) Bloomberg

Bloomberg is adaptive learning website for GMAT that offers lessons with more than 5000 practice questions. It is one of the best online coaching for GMAT that contains AI software that analyzes the performance of students.

Bloomberg offers personalized strategies based on your learning history. It provides a messaging system to get the explanation of questions from the GMAT tutor. This platform provides a well-structured curriculum that helps you to learn the topic in depth.

👍 Pros 👎 Cons

You can learn from iOS and Android mobile apps. The maximum validity of the GMAT plan is only 6 months.

It uses adaptive learning technology that focuses on your academic weaknesses.  

10) e-GMAT

e-GMAT is a platform that offers GMAT online prep course. This website enables you to track your improvement. It is one of the best online GMAT coaching which allows you to enroll in verbal or quantitative courses.

e-GMAT offers customized monthly strategy sessions and study plans. The website has more than 4500 questions with doubt clearing sessions. It helps you to learn the topic fast and more efficiently.

👍 Pros 👎 Cons

You can learn from audio and visuals. There is no adaptive technology.

Provides prompt response from the mentors. It does not provide options for 1 on 1 learning (one student communicating with one instructor).

You can analyze your performance.  

This GMAT prep program enables you to purchase the only module you require.  

FAQs:

GMAT (Graduate Management Admission Test) is a CAT used to measure the skills in the field of mathematics, English, and analytical writing. It is a multiple-choice, computer-based exam that is required for admission to MBA.

Below are some of the best GMAT Prep Courses:

Magoosh GMAT

Princeton Review GMAT

Target Test Prep GMAT

Kaplan GMAT

PrepScholar GMAT

Yes, an average student can easily crack GMAT by enrolling in GMAT online prep course.

GMAT questions generally include analytical writing assessment, integrated reasoning, quantitative, verbal.

Math questions of GMAT involve arithmetic, word problems, algebra, and geometry.

It is recommended that you take GMAT prep courses before around 5-6 months of your GMAT exam date. This will allow you to study and prepare for all the topics and subjects very well and you will be well-prepared for your GMAT exam. This way, you will easily crack and score well in the GMAT exam.

It depends on each course length. The time duration differs for every GMAT course. Some courses have a shorter length while others have a long period to complete. On average, you can easily complete a full-length GMAT course within around 3 months in which you can cover all the subjects with practice.

Here are some tips and tricks to increase your GMAT score:

Make a plan that best suits your schedule and preparation

Practice realistic questions, take online practice tests, and mock tests

Learn at your own pace with a deep understanding

Constantly practice and review math section

Read and practice from relevant textbooks and resources

Practice real GMAT essay prompts

Visit GMAT forums for solving doubts

Yes, you can take the GMAT test online at the comfort of your home or you can take the exam at the exam test center as well.

Best GMAT Online Coaching

Explain The Usage Of Classes And The Benefits Of Inheritance In Swift

Introduction

This article will guide you about the usage of Class and what are the benefits of using inheritance in the Swift language.

In this article, we will cover the following things −

What is a class and what is its usage in Swift?

What is inheritance and what are its benefits?

What is a Class?

In the Swift language, a class is a representation of properties and methods. We use classes to encapsulate properties and methods into a single entity that has the same characteristics.

We use classes to store information in variables and constants. A class can contain methods to calculate information and return values if required.

For example, we can create a class named Student to store information like name, age, grade, score, school, etc using variables. To manipulate the properties we can define methods.

Benefits of Class

It is possible to inherit characteristics from one class to another by using classes.

During runtime, typecasting allows users to verify the type of the class.

The de-initializer releases memory resources.

Example

In this example, we will create a Student class to store some basic information about a student. We will see how to use these properties by creating a student class.

class Student { var name: String var grade: Int = 0 var score: Float = 0.0 var city: String = "" var schoolName: String init(name: String, schoolName: String) { chúng tôi = name self.schoolName = schoolName } func displayInfo() { } } let john = Student(name: "John Johnson", schoolName: "Notional School") print("name: (john.name)") print("school name: (john.schoolName)") Output name: John Johnson school name: Notional School How can we Store Information in a Class?

Basically, we can store information in a class using properties. Swift’s classes can be used to access various types of properties.

Using properties in a class, we can read and write information. We have two types of properties in Swift: stored properties and computed properties.

Swift Language offers Different Types of Properties

Stored Properties −These are used to store information permanently. Until that instance is in memory, it will exist in memory. Once you create an instance of a class, it takes up space in memory.

Lazy Stored Properties −These are special types of stored properties that will be calculated when accessed for the first time. We used the lazy modifier as a prefix while declaring a lazy property.

Computed Properties −For some calculations on the properties of a class, we can use computed properties instead of changing the original values. To achieve this, we can use computed properties that return the calculated value.

Using methods, we can perform different actions inside a class.

func greeting(_ name: String) { print("Good morning, (name)") } What is Inheritance?

Inheritance is a way to adapt the characteristics and methods of one class to another class. By inheritance, we can extend the functionalities of an existing type by adding supplementary characteristics to another type.

When we inherit a class (for eg Class B) from another class (for eg Class A), Class B is called a subclass and Class A is called a superclass.

Benefits of Using Inheritance

There are some benefits to using inheritance in the Swift language. There are the following −

Reduce code redundancy.

Provides better code reusability.

Parent and child classes are easy to maintain while writing code.

We can add extra functionality to a subclass by overriding the existing functionality of the parent class.

Example

In the below example, we will create a superclass and some subclasses by inheriting them from the superclass. Let’s see how superclasses can be beneficial for us while writing code.

import Foundation class Person { var name: String var address: String var age: Int init(name: String, address: String, age: Int) { chúng tôi = name self.address = address chúng tôi = age } } } class Student: Person { var collegeName: String var grade: Int init(collegeName: String, grade: Int, name: String, address: String, age: Int) { self.collegeName = collegeName self.grade = grade super.init(name: name, address: address, age: age) } func checkAgeEligibility() { if self.isYoung() { print("(self.name) is eligible to take admission.") } else { print("(self.name) is not eligible to take admission.") } } } class Voter: Person { var isPreviouslyCasted: Bool = false func eligibleToVote() { if self.isYoung() && isPreviouslyCasted { print("(self.name) is eligible to cast vote.") } else { print("(self.name) is not eligible to cast vote.") } } } let student = Student(collegeName: "Primary School", grade: 11, name: "Amit Bhalla", address: "New Delhi", age: 13) student.checkAgeEligibility() let voter = Voter(name: "Sunil Chandra", address: "Bangalore", age: 21) voter.eligibleToVote() Output Amit Bhalla is not eligible to take admission. Sunil Chandra is not eligible to cast vote. Explanation

In the above example, we created a class called Person with the method isYoung() to check the eligibility of the person.

The Student and Voter classes are now inherited from the Person class, with the addition of methods associated with sub-classes.

Conclusion

Inheritance is the most important concept in Swift language to write the core in proper hierarchy. Always, try to define superclasses to make common things separate.

Sorting Odd And Even Elements Separately Javascript

In our problem statement we have to sort odd and even elements separately with the help of Javascript functionalities. So for doing this task we will use for loops and bubble sort for sorting odd and even numbers separately.

Understanding the problem statement

The problem statement is to write a Javascript function that will help to sort odd and even numbers in a given array. For example if we have an array [2, 3, 5, 4] then we will first sort even indexed elements [3, 4] and then sort the odd indexed elements in the array [2, 5]. After sorting these two subarrays we will merge these two arrays to get the resultant sorted array.

Logic for the given problem

To sort the elements we will basically use bubble sort to sort even indexed and odd indexed elements separately. So in every iteration of the loop we will set swapped values to false. If we make a swap then set it to true. Then we will loop through the odd indexed array and do the same procedure and set swap to true if we have swapped the elements if the first element is greater than the second element. At the end we sorted the array.

Algorithm

Step 1 − Declare a function called sortOddEven which is using a parameter of array of length n.

Step 2 − Use bubble sort algorithm to sort the even indexed and odd indexed elements separately.

Step 3 − Loop through the elements of the array. Then set swapped to false.

Step 4 − Loop even indexed elements and compare every pair of even indexed elements and swap them if they are in the wrong order. If we have swapped the items then set swapped to true.

Step 5 − Then loop odd indexed elements and compare every pair of odd numbers starting index from 1 and swap them if they are in the incorrect order. If we have swapped the items then set the swapped value to true.

Step 6 − Repeat the step four and five until no swaps required in the iteration.

Step 7 − Return the final result array which contains all sorted elements of the input array.

Code for the algorithm function sortOddEven(arr) { const n = arr.length; let swapped; do { swapped = false; for (let i = 0; i < n - 1; i += 2) { [arr[i], arr[i + 2]] = [arr[i + 2], arr[i]]; swapped = true; } } for (let i = 1; i < n - 1; i += 2) { [arr[i], arr[i + 2]] = [arr[i + 2], arr[i]]; swapped = true; } } } while (swapped); return arr; } const arr = [9, 2, 7, 4, 5, 6, 3, 8, 1]; console.log(sortOddEven(arr)); Complexity

The time complexity of the bubble sort algorithm is O(n^2) in which n is the length of the array. But we are sorting the even indexed and odd indexed items separately so the actual number of comparisons and swaps is half the size of it, so the actual time complexity of the algorithm is equal to O(n).

Conclusion

In the above code we have implemented a solution to get the sorted array by sorting the even and odd indexed elements separately in Javascript. It is simple and easy to understand. And this algorithm is well suited for small sized arrays and not efficient for large arrays.

How To Validate A Date Pattern In Javascript?

In this tutorial, we will learn how to validate a date pattern in JavaScript.

The Date object in JavaScript represents a single point in time in a platform-independent way. It carries a number representing time in milliseconds since January 1, 1970, at 00:00:00. (UTC). The Date object can format differently, so it is essential to validate a date pattern before using it.

In this tutorial, we will discuss two ways to validate a date pattern in JavaScript −

Using the getTime() method

Using the Date constructor and split() method

Validate a Date Pattern using the getTime() Method

In JavaScript, the getTime() method returns the time in milliseconds since January 1, 1970, at 00:00:00. (UTC). Firstly, we create a JavaScript date object by passing the date pattern in the Date constructor, and then we call the getTime() method on it. If the provided pattern is invalid, this method returns NaN (not a number).

Syntax const isValid = new Date('14/14/2024').getTime() console.log(isValid) if (isNaN(isValid)) { console.log('Date pattern is invalid') } else { console.log('Date pattern is valid') }

In the above syntax, we use a date pattern ‘14/14/2024’ to create a Date object and use the getTime() method. After that, the return value of the getTime() method is checked to determine whether it is NaN or not using the isNaN() method. If the value is NaN, then the date pattern is invalid.

Example

.

element

{

padding

:

15

px

;

margin

top

:

5

px

;

background

color

:

rgb

(

169

,

231

,

224

)

;

border

:

1

px solid black

;

}

const

element1

=

document

.

getElementById

(

‘element1’

)

const

element2

=

document

.

getElementById

(

‘element2’

)

const

element3

=

document

.

getElementById

(

‘element3’

)

const

element4

=

document

.

getElementById

(

‘element4’

)

const

element5

=

document

.

getElementById

(

‘element5’

)

const

element6

=

document

.

getElementById

(

‘element6’

)

const

date1

=

‘1/1/2024’

const

date2

=

’14/14/2024′

const

date3

=

’10-10-2000′

const

date4

=

’32-32-2000′

const

date5

=

‘January 1 2023’

const

date6

=

‘January 35 2023’

function

validatePattern

(

)

{

element1

.

innerHTML

=

date1

+

‘ = ‘

+

validate

(

date1

)

element2

.

innerHTML

=

date2

+

‘ = ‘

+

validate

(

date2

)

element3

.

innerHTML

=

date3

+

‘ = ‘

+

validate

(

date3

)

element4

.

innerHTML

=

date4

+

‘ = ‘

+

validate

(

date4

)

element5

.

innerHTML

=

date5

+

‘ = ‘

+

validate

(

date5

)

element6

.

innerHTML

=

date6

+

‘ = ‘

+

validate

(

date6

)

}

function

validate

(

pattern

)

{

const

isValid

=

new

Date

(

pattern

)

.

getTime

(

)

if

(

isNaN

(

isValid

)

)

{

return

‘invalid’

}

else

{

return

‘valid’

}

}

Validate a Date Pattern using the Date Constructor and split() Method

In this approach, we take the date pattern and split it into an array using the split() method; then, we create a JavaScript date object with the array elements. After that, we check the date object’s month, date, and year with the date pattern. If the Date object is invalid or the day, month, or year does not match the date pattern, then the date pattern should be considered invalid. This approach can only be used for the ‘MM/DD/YYYY’ type of date pattern.

Syntax function validate(date) { var split = date.split('/') var date = new Date(split[2] + '/' + split[0] + '/' + split[1]) return ( date && date.getMonth() + 1 == split[0] && date.getDate() == Number(split[1]) && date.getFullYear() == Number(split[2]) ) }

In the above syntax, the validate function uses the Date constructor and split method to validate the date pattern.

Example

<

div id

=

“root”

function

validatePattern

(

)

{

const

date_pattern

=

document

.

getElementById

(

‘date-pattern’

)

.

value

const

root

=

document

.

getElementById

(

‘root’

)

root

.

innerHTML

=

date_pattern

+

‘ = ‘

+

validate

(

date_pattern

)

}

function

validate

(

date

)

{

var

split

=

date

.

split

(

‘/’

)

var

date

=

new

Date

(

split

[

2

]

+

‘/’

+

split

[

0

]

+

‘/’

+

split

[

1

]

)

return

(

date

&&

date

.

getMonth

(

)

+

1

==

split

[

0

]

&&

date

.

getDate

(

)

==

Number

(

split

[

1

]

)

&&

date

.

getFullYear

(

)

==

Number

(

split

[

2

]

)

)

}

In this tutorial, we have learned how to validate date patterns with JavaScript. We have discussed two approaches: the getTime() method and the Date constructor and split() method. Users can follow any of these as per their requirements.

Invoke A Function With A Function Constructor In Javascript

A function constructor invocation creates a new object. The new object inherits the properties and methods from the constructor. This keyword in the constructor does not have a value. This value will be a new object created when the function is invoked. Function construction creates functions that execute the global scope only.

In JavaScript invoking a function with a function, the constructor is different from invoking a function as a method or invoking a function. Because it creates a new object that constructs properties and methods.

Syntax

Following is the snippet invoking a function with a function constructor. Here, we are creating a function and pa, passing parameters, and inheriting these two parameters to this keyword with var1 and var2.

Function functioName(arg1, arg2){ chúng tôi = arg1; chúng tôi = arg2; } var x = new functionName(1,2) Example: 1

In the following example, a function and a function constructor were created. And the function constructor inherits the properties of the function. Then we were passing the value as an object.

function funcDemo(arg1, arg2) { chúng tôi = arg1; chúng tôi = arg2; } var obj = new funcDemo(10, 20); document.write(JSON.stringify(obj)); document.write(obj.var1 + ” ” + obj.var2);

Example 2

In the following example, we are creating a function constructor and also passing the constructor method. And calling the method and variables with the help of an object.

function details() { chúng tôi = “Aman kumar”; chúng tôi = 23; this.greet = function () { document.write(“Hello! What is your name and age ?”); }; } var obj = new details(); obj.greet(); document.write(obj.name + ” ” + obj.age);

Example 3

In the following example, we are using a function constructor named User and printing the details of the user.

function Users(name, age, state, degree, designation) { chúng tôi = name; chúng tôi = age; this.state = state; this.degree = degree; this.designation = designation; } const obj = new Users( “Aman”, 23, “Jharkhand”, “B-Tech”, “technical Writer” ); document.write(JSON.stringify(obj));

Example 4

Let us see another example −

let areaFun = function (side1, side2) { this.length = side1; this.width = side2; }; let result = new areaFun(5, 5); document.getElementById(“getArea”).innerHTML = JSON.stringify(result);

Update the detailed information about Getters And Setters In Javascript Classes? on the Achiashop.com website. We hope the article's content will meet your needs, and we will regularly update the information to provide you with the fastest and most accurate information. Have a great day!