Introduction to JavaScript Higher Order Functions: Reduce

5m 27s

This practical lesson explores the JavaScript Higher Order Function - Reduce. A higher order function is a function that takes another function as an argument or returns a function.  The purpose of the reduce function is to take an array and reduce it to a singular value.

Learning Objectives

  • Learn how reduce works
  • Learn about the reducer function, which is the first argument of reduce
  • Learn about the structure of the reducer and how it iterates through the array argument
  • Learn about the optional initial value which may change the result of the reduce function

Intended Audience

This lesson is intended for anyone who wants to learn about JavaScript Higher Order Functions: Reduce.


Introduction to JavaScript Higher Order Functions: Map & Filter

This lesson does include the use of template string expressions as part of its demonstration. If you are not familiar with this subject, the following lesson is recommended:

Introduction to JavaScript Template Literals

About the Author
Farish Kashefinejad, opens in a new tab
Full-Stack Development Content Creator
Learning paths

Farish has worked in the EdTech industry for over six years. He is passionate about teaching valuable coding skills to help individuals and enterprises succeed.

Previously, Farish worked at 2U Inc in two concurrent roles. Farish worked as an adjunct instructor for 2U’s full-stack boot camps at UCLA and UCR. Farish also worked as a curriculum engineer for multiple full-stack boot camp programs. As a curriculum engineer, Farish’s role was to create activities, projects, and lesson plans taught in the boot camps used by over 50 University partners. Along with these duties, Farish also created nearly 80 videos for the full-stack blended online program.

Before 2U, Farish worked at Codecademy for over four years, both as a content creator and part of the curriculum experience team.

Farish is an avid powerlifter, sushi lover, and occasional Funko collector.

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