simple and small curry function
const curry = (fn, ...args) => {
if (args.length === fn.length) return fn(...args)
return (...more) => curry(fn, ...args, ...more)
}
/*
const add = (a, b, c) => a + b + c
const curred = curry(add)
console.log(add(1,2,3)) // 6
console.log(curred(1)) // (b, c) => 1 + b + c
console.log(curred(1,2)) // (c) => 1 + 2 + c
console.log(curred(1,2,3)) // 6
console.log(curred(1)(2,3)) // 6
console.log(curred(1,2)(3)) // 6
*/