JavaScript: Functional Programming for JavaScript Developers

Appendix B. Glossary of Terms

This appendix covers some of the important terms that are used in this book:

• Anonymous function: A function that has no name and is not bound to any variables. It is also known as a Lambda Expression.
• Callback: A function that can be passed to another function to be used in a later event.
• Category: In terms of Category Theory, a category is a collection of objects of the same type. In JavaScript, a category can be an array or object that contains objects that are all explicitly declared as numbers, strings, Booleans, dates, objects, and so on.
• Category Theory: A concept that organizes mathematical structures into collections of objects and operations on those objects. The data types and functions used in computer programs ...