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.

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.

Our inner function, the one that currently just returns value1, also needs to be modified to return value1 or value2. ... JavaScript tutorial: Higher-order functions. Apr 18, 2019 4 mins. how-to.