// A contrived compose function.
const compose = (f1, f2) => (...args) => f1(f2(...args));

// These functions are curried. Instead of the usual (a, b) => a + b, we're supplying each parameter individually
// and then returning a function that takes the next param.
// This is currying. We're taking a function that normally has 2 params, and turning it into a function that takes 1 param,
// then returns another function expecting the second param.
const add = a => b => a + b;
const multiply = a => b => a * b;


// Let's build a new function by composing the above 2 and partially applying some values to them
const addTwoThenDouble = compose(multiply(2), add(2));

// Running this over the value 10 looks like this
addTwoThenDouble(10) // outputs 24