Register to get access to free programming courses with interactive exercises

About course JS: Functions

Functions is a powerful tool with a wide range of possibilities. This course is designed to help you get to grips with the functions for real. Everything before this course is just the tip of the iceberg.

In this course, we will learn how to create functions so that code is predictable and convenient. Let's examine the handling of collections and see how functions are used in libraries and modern web frameworks.

Basic concepts of the course:

  • Net functions and side effects. Determinacy.
  • Scope and closure
  • Spread and rest operators
  • Objects of the first kind
  • Higher order functions
  • Functional programming

The topics and features listed above are not always present in a JS developer's daily routine (and even more so in other languages), but it's important to be aware of them. First, the approaches covered in this course are not specific to JavaScript. Knowing them will make it much easier for you to switch to other languages. Secondly, working with functions will significantly boost your programming skills.


Are there any more questions? Ask them in the Discussion section.

The Hexlet support team or other students will answer you.

About Hexlet learning process

For full access to the course you need a professional subscription.

A professional subscription will give you full access to all Hexlet courses, projects and lifetime access to the theory of lessons learned. You can cancel your subscription at any time.

Get access
130
courses
1000
exercises
2000+
hours of theory
3200
tests

Sign up

Programming courses for beginners and experienced developers. Start training for free

  • 130 courses, 2000+ hours of theory
  • 1000 practical tasks in a browser
  • 360 000 students
By sending this form, you agree to our Personal Policy and Service Conditions

Our graduates work in companies:

<span class="translation_missing" title="translation missing: en.web.courses.lessons.registration.bookmate">Bookmate</span>
<span class="translation_missing" title="translation missing: en.web.courses.lessons.registration.healthsamurai">Healthsamurai</span>
<span class="translation_missing" title="translation missing: en.web.courses.lessons.registration.dualboot">Dualboot</span>
<span class="translation_missing" title="translation missing: en.web.courses.lessons.registration.abbyy">Abbyy</span>
Suggested learning programs
profession
Development of front-end components for web applications
10 months
from scratch
Start at any time

Use Hexlet to the fullest extent!

  • Ask questions about the lesson
  • Test your knowledge in quizzes
  • Practice in your browser
  • Track your progress

Sign up or sign in

By sending this form, you agree to our Personal Policy and Service Conditions
Toto Image

Ask questions if you want to discuss a theory or an exercise. Hexlet Support Team and experienced community members can help find answers and solve a problem.