Javascript currying

curry.js

Function.prototype.curry = function(...args) {
  const fn = this;
  return function (...additional) {
    return fn.apply(this, args.concat(additional));
  };
};

// examples
function greet(word, name) {
  console.log(word, name);
}

let curried = greet.curry("Hello,");
curried("John!");
// -> "Hello, John!"