Curry a function in JavaScript

curry-example.js

/**
 * Curry the given function
 *
 * @param func    {Function} the function to curry
 * @param context {Object}   (optional) the execution context to
 *                           apply/bind to the returned curried
 *                           function
 * @returns {Function}
 */
function curry(func, context = null) {
  return (...args) => args.length < func.length
    ? curry(func.bind(context, ...args))
    : func.apply(context, args);
}


// An example of currying a simple function
function foo(one, two, three) {
  bin.log(`${one} ${two} ${three}`);
}

const curriedFoo = curry(foo);

const things = [
  'Sweet',
  'Awesome',
  'Amazing',
  'JavaScript'
];

things.forEach(thing => foo('This', 'is', thing));

things.forEach(curriedFoo('This', 'is not so'));

foo('This', 'is', 'Normal');

curriedFoo('Wow')('Much Weird')('Very Parentheses');


// An example of externally currying a class method
class Baz {
  constructor(name) {
    this.name = name;
  }
  
  log(one, two, three) {
    bin.log(`${one} ${this.name} ${two} ${three}`);
  }
}

const cyclops = new Baz('Cyclops');

cyclops.log('This', 'is', 'one eyed');

cyclops.log = curry(cyclops.log, cyclops);

cyclops.log('This')('is talking to')('Nobody');


// An example of internally currying a class method
class Bar extends Baz {
  constructor(name) {
    super(name);
    this.log = curry(this.log, this);
  }
}

const actor = new Bar('Actor');

actor.log('This', 'is as', 'expected');

actor.log('This')('is super', 'Agile');

Currying a function in JS. Not a good thing in my opinion, but worth understanding how it works. I figured it out this weekend so sharing for whoever else might be interested 😄

http://www.webpackbin.com/EJxou5dWb
This bin should work.. but not sure.. so if it doesn't let me know.
(click on "main.js" to see the code and click on the "Log" button to see the log output)