How to flip the arguments of a function in JavaScript

In this Article we will go through how to flip the arguments of a function only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

// Reverse the order of arguments
const flip = fn => (...args) => fn(...args.reverse());

// For binary functions
const flip = fn => (b, a) => fn(a, b);

#Or for curried functions

const flip = fn => b => a => fn(a)(b);


const isParent = (parent, child) => parent.children.includes(child);
const isChild = flip(isParent);