Hands-On Functional Programming with TypeScript

Partial application

Partial application is a functional programming technique that allows us to pass the arguments required by a function at different points in time.

This technique can feel like a weird idea at first glance, because most software engineers are used to the idea of applying or invoking a function at a unique point in time (complete application), as opposed to applying a function at multiple points in time (partial application).

The following code snippet implements a function that doesn't support partial application and invokes it (providing all the required arguments) at a single point in time:

function add(a: number, b: number) {    return a + b;}const result = add(5, 5); // All arguments are provided at the same timeconsole.log(result); ...