ES5 version of curry

curry-es6.js

// curry :: (* -> a) -> (* -> a)
const curry = (fn) => function cf(...args){
  return (args.length >= fn.length) ?
    fn(...args) :
    (...newArgs) => cf(...[...args, ...newArgs])
};

curry.js

/**
 * curry
 *
 * @param {Function} fn
 * @param {Object} ctx
 * @return {Function}
 */
var curry = function curry(fn, ctx){
  return function cf(){
    var args = [].slice.call(arguments);
    return (args.length >= fn.length) ?
      fn.apply(null, args) :
      function () {
        return cf.apply(ctx, args.concat([].slice.call(arguments)));
      };
  };
}