Those are examples of higher-order functions that accept functions as arguments, but plenty of them return functions as well. If you’ve ever seen a function call that has two sets of parentheses ...

The trick to mastering JavaScript is knowing when and how to use some of its more idiosyncratic patterns and constructs. Get coding tips for using closures, inheritance, and more in JavaScript.

Functional programming supports higher-order functions and first-order functions. Higher-order functions take other functions as arguments or return functions as results. ... 4 pseudocode examples: ...