calculating-with-functions.js

const makeNumber = (n, f) => f ? f(n) : n;
const zero = f => makeNumber(0, f);
const one = f => makeNumber(1, f);
const two = f => makeNumber(2, f);
const three = f => makeNumber(3, f);
const four = f => makeNumber(4, f);
const five = f => makeNumber(5, f);
const six = f => makeNumber(6, f);
const seven = f => makeNumber(7, f);
const eight = f => makeNumber(8, f);
const nine = f => makeNumber(9, f);
const plus = b => a => a + b; 
const minus = b => a => a - b; 
const times = b => a => a * b; 
const dividedBy = b => a => a / b;