JavaScript’s arrays can hold heterogeneous types, change size on the fly, and readily insert or remove elements. Traditional methods like slice, splice, and push/pop do this by operating on the array ...

Now what if we want to filter our collection of users for those whose favorite color is red? We could define an entirely new function, redFilter(), but that seems wasteful. Instead, let's just pass in ...

This project demonstrates how to use the .filter() method in various real-world scenarios inside a Next.js 15 app. You'll learn how to dynamically filter arrays, handle user input, and combine ...