When to Use a Function Expression vs. Function Declaration
Learn when to use function expressions vs. function declarations in JavaScript, and how these methods for defining functions are different.
Tag: functional-js
How to Use Higher-Order Functions in JavaScript
Higher-order functions can take other functions as arguments or return a function as a result. Learn how to use them and why they're useful.
10 Lodash Features You Can Replace with ES6
Dan Prince demonstrates ten ways you can use native ES6 features (such as arrow functions & collection methods) to replace Lodash in your projects.
Grab Our Free Printable Functional JavaScript Cheat Sheet
Read Grab Our Free Printable Functional JavaScript Cheat Sheet and learn JavaScript with SitePoint. Our web development and design tutorials, courses, and books will teach you HTML, CSS, JavaScript, PHP, Python, and more.
A Beginner’s Guide to Testing Functional JavaScript
Functional code is often touted as easier to test. M. David Green examines that claim and demonstrates how to get started testing functional JavaScript.
Filtering and Chaining in Functional JavaScript
M. David Green uses filtering to limit a data set & chaining to combine the results with map/reduce. The result—clean code that performs complex operations.
Fun Functional Programming with the Choo Framework
With the aid of seven comprehensive demos, Mark Brown introduces you to Choo — a fun new framework for building single page apps in a functional manner.
Function Composition: Building Blocks for Maintainable Code
M. David Green demonstrates how to implement function composition in JavaScript, a technique which lends itself to writing cleaner and more succinct code.
Immutable Data and Functional JavaScript with Mori
Using the Mori library, Dan Prince demonstrates how to create and work with immutable data structures, making your code simpler and easier to reason about.
Using Map and Reduce in Functional JavaScript
M. David Green demonstrates how using the functional programming techniques of mapping & reducing can lead to cleaner code which is easy to read & maintain.
A Beginner’s Guide to Currying in Functional JavaScript
M. David Green demonstrates the concept of currying — a useful technique, to partially evaluate functions and make your functional JavaScript more readable.
Recursion in Functional JavaScript
M. David Green demonstrates the powerful, but dizzying concept of recursion by refactoring normal for and while loops to use functions that call themselves.