If you write JavaScript, you have probably used higher-order functions and not even noticed. If you have ever replaced a for loop with an array method, you’ve used higher-order functions.

While he specializes in JavaScript, both browser and server side, he also takes a keen interest in modern data stores (particularly graph databases) and distributed computing platforms.

There’s a lot you can do with JavaScript: Images can swap when you move a mouse over them, form elements can influence each other on the fly, and calculations can be made without having to ...