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JavaScript from Beginner to Professional

You're reading from   JavaScript from Beginner to Professional Learn JavaScript quickly by building fun, interactive, and dynamic web apps, games, and pages

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Product type Paperback
Published in Dec 2021
Publisher Packt
ISBN-13 9781800562523
Length 546 pages
Edition 1st Edition
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Authors (4):
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Codestars By Rob Percival Codestars By Rob Percival
Author Profile Icon Codestars By Rob Percival
Codestars By Rob Percival
Laurence Svekis Laurence Svekis
Author Profile Icon Laurence Svekis
Laurence Svekis
Maaike van Putten Maaike van Putten
Author Profile Icon Maaike van Putten
Maaike van Putten
Rob Percival Rob Percival
Author Profile Icon Rob Percival
Rob Percival
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Toc

Table of Contents (19) Chapters Close

Preface 1. Getting Started with JavaScript FREE CHAPTER 2. JavaScript Essentials 3. JavaScript Multiple Values 4. Logic Statements 5. Loops 6. Functions 7. Classes 8. Built-In JavaScript Methods 9. The Document Object Model 10. Dynamic Element Manipulation Using the DOM 11. Interactive Content and Event Listeners 12. Intermediate JavaScript 13. Concurrency 14. HTML5, Canvas, and JavaScript 15. Next Steps 16. Other Books You May Enjoy
17. Index
Appendix – Practice Exercise, Project, and Self-Check Quiz Answers

String methods

We have worked with strings already and chances are that you have run into some of the methods on strings by now. There are a few we didn't address specifically just yet and we are going to discuss them in this section.

Combining strings

When you want to concatenate strings, you can use the concat() method. This does not change the original string(s); it returns the combined result as a string. You will have to capture the result in a new variable, else it will get lost:

let s1 = "Hello ";
let s2 = "JavaScript";
let result = s1.concat(s2);
console.log(result);

This will log:

Hello JavaScript

Converting a string to an array

With the split() method we can convert a string to an array. Again, we will have to capture the result; it is not changing the original string. Let's use the previous result containing Hello JavaScript. We will have to tell the split method on what string it should split. Every time it encounters...

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