How to curry a function in JavaScript

In this Article we will go through how to curry 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:

const curry = (fn, ...args) => fn.length <= args.length ? fn(...args) : curry.bind(null, fn, ...args);

const sum = (a, b, c) => a + b + c;
curry(sum)(1)(2)(3);    // 6
curry(sum)(1, 2, 3);    // 6
curry(sum, 1)(2, 3);    // 6
curry(sum, 1)(2)(3);    // 6
curry(sum, 1, 2)(3);    // 6
curry(sum, 1, 2, 3);    // 6