Functional programming, as the name implies, is about functions. While functions are part of just about every programming paradigm, including JavaScript, a functional programmer has unique ...

‘Higher-order functions’ is a fancy term for functions that take other functions as arguments or that return functions. Very powerful!

JavaScript secret No. 3: Invoking functions After understanding the most common way to invoke a function (using the parentheses operator), it’s time to learn how to use call and apply.