JS Curry Example

js-curry.js

// A sample Currying function
const partial = (f, ...as) => {
  if (as.length === 0) { return f.call(); }
  const a = as.shift();
  if (a === undefined) { return f; }
  const p = f.bind(f, a);
  return partial(p, ...as);
}

// Composition function
const $ = f => (g, x) => x === undefined ? x => f(g(x)) : f(g(x));