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JavaScript - Exercises, Practice, Solution

What is JavaScript?

JavaScript is a cross-platform, object-oriented scripting language. It is a small and lightweight language. Inside a host environment ( a web browser), JavaScript can be connected to the objects of its environment to provide programmatic control over them.

JavaScript contains a standard library of objects, such as Array, Date, and Math, and a core set of language elements such as operators, control structures, and statements. Core JavaScript can be extended for a variety of purposes by supplementing it with additional objects.

The best way we learn anything is by practice and exercise questions. We have started this section for those (beginner to intermediate) who are familiar with JavaScript. Hope, these exercises help you to improve your JavaScript coding skills. Currently following sections are available, we are working hard to add more exercises. Happy Coding!

List of JavaScript Exercises :

More to Come !

Popularity of Programming Language
Worldwide, Nov 2022 compared to a year ago:

`
Rank Change Language Share Trend
1 Python 28.44 % -1.2 %
2 Java 17.03 % -0.3%
3 Javascript 9.51 % +0.3%
4 C# 7.08 % -0.1%
5 C/C++ 6.51 % -0.4 %
6 PHP 5.12 % -1.0 %
7 R 4.12 % +0.4%
8 up arrow TypeScript 2.89 % +1.3%
9 down arrow Objective-C 2.17 % +0.1%
10 Swift 2.11% +0.4%
11 down arrow Go2.07% +0.7%
12 down arrow Kotlin 1.81 % +0.1%
13 up arrow Rust 1.7 % +0.6%
14 down arrow Matlab 1.58 % +0.2%
15 up arrow Ruby 1.07% +0.1%
16 down arrow VBA 0.97 % -0.2 %
17 Ada 0.81 % -0.0 %
18 up arrow Dart 0.76 % +0.3 %
19 down arrow Scala 0.73 % -0.0 %
20 up arrow Lua 0.64 % +0.2 %
21 down arrow Visual Basic 0.62 % -0.1 %
22 down arrow Abap 0.48 % -0.0 %
23 Perl 0.38 % +0.0 %
24 Groovy 0.37 % +0.0 %
25 up arrow Julia 0.3 % +0.0 %
26 up arrow Haskell 0.29 % +0.0 %
27 down arrow Cobol 0.28 % -0.1 %
28 Delphi/Pascal 0.12 % -0.1 %

Source : https://pypl.github.io/PYPL.html

TIOBE Index for November 2022

Nov 2022 Nov 2021 Change Programming Language Ratings Change
1 1 Python 17.18% +5.41%
2 2 C 15.08% +4.35%
3 3 Java 11.98% +1.26%
4 4 C++ 10.75% +2.46%
5 5 C# 4.25% -1.81%
6 6 Visual Basic 4.11% -1.61%
7 7 JavaScript 2.74% +0.08%
8 8 Assembly language 2.18% -0.34%
9 9 SQL 1.82% -0.30%
10 10 PHP 1.69% -0.12%
11 18 up arrow Go 1.15% -0.06%
12 15 up arrow R 1.14% -0.14%
13 11 down arrow Classic Visual Basic 1.10% -0.46%
14 17 up arrow Delphi/Object Pascal 1.08% -0.14
15 20 up arrow MATLAB 1.02% -0.15%
16 28 up arrow Objective-C 0.93% +0.39%
17 24 up arrow Scratch 0.88% +0.11%
18 14 up arrow Swift 0.87% -0.56%
19 13 down arrow Ruby 0.85% -0.59%
20 29 up arrow Rust 0.75% +0.21%

Source : https://www.tiobe.com/tiobe-index/

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.

Note : Since JavaScript is a loosely-typed, dynamic and expressive language, you may accomplish the same task in various ways. Therefore the ways (solution of the exercises) described here are not the only ways to do stuff. Rather, it would be great, if this helps you anyway to choose your own methods.

[ Want to contribute to JavaScript exercises? Send your code (attached with a .zip file) to us at w3resource[at]yahoo[dot]com. Please avoid copyrighted materials.]



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JavaScript: Tips of the Day

function and arguments

const person = {
  name: 'Lydia Hallie',
  hobbies: ['coding'],
};

function addHobby(hobby, hobbies = person.hobbies) {
  hobbies.push(hobby);
  return hobbies;
}

addHobby('running', []);
addHobby('dancing');
addHobby('baking', person.hobbies);

console.log(person.hobbies);

The addHobby function receives two arguments, hobby and hobbies with the default value of the hobbies array on the person object.
First, we invoke the addHobby function, and pass "running" as the value for hobby and an empty array as the value for hobbies. Since we pass an empty array as the value for y, "running" gets added to this empty array.
Then, we invoke the addHobby function, and pass "dancing" as the value for hobby. We didn't pass a value for hobbies, so it gets the default value, the hobbies property on the person object. We push the hobby dancing to the person.hobbies array.
Last, we invoke the addHobby function, and pass "bdaking" as the value for hobby, and the person.hobbies array as the value for hobbies. We push the hobby baking to the person.hobbies array.
After pushing dancing and baking, the value of person.hobbies is ["coding", "dancing", "baking"]

Ref: https://bit.ly/2Hcpkm6