Functions are self-contained routines that can be “called” elsewhere within your JavaScript code. Along with loops and conditionals, functions are an essential means of organizing software.

At Microsoft's Ignite 2017 conference today, the company announced a range of new features that will be coming to its Excel application, such as JavaScript Custom Functions and more.

The above example may seem trivial and not very useful, ... JavaScript tutorial: Higher-order functions. Apr 18, 2019 4 mins. how-to. JavaScript memoization: Handy functional programming.