Point free factorial kata

factorial.js

var R = require('ramda');

// `proxy` is a function to allow for point-free recursion in JavaScrpipt 
// it takes in a function name as a string, and returns a proxy function to the original function
var factorial = R.ifElse(
  R.eq(0), R.always(1),
  R.converge(R.multiply, R.I, R.compose(proxy('factorial'), R.dec))
);

factorial(0);
// => 1

factorial(5);
// => 120