Currying Javascript

curry.js

function t1(a, b, c) {
  console.log(a, b, c);
}

t1(1, 2, 3); // 1 2 3

t2 = t1.bind(undefined, 10);
t2(2, 3); // 10 2 3

t3 = t2.bind(undefined, 20); // t3 = t1.bind(undefined, 10, 20);
t3(3); // 10 20 3

// Generic Currying

// subCurry(fn, 1)(2, 3)
var subCurry = function (fn /* Multiple arguments possible */) {
  var args = [].slice.call(arguments, 1); // Dont take the first argument
  return function () {
    var thisArgs = Array.prototype.slice.call(arguments);
    return fn.apply(this, args.concat(thisArgs));
  };
};

// curry(fn)(1)(2)(3)
var curry = function (fn, length) {
  // Length will only be available after the first curry
  length = length || fn.length;
  return function () {
    if (arguments.length < length) {
      var thisArgs = Array.prototype.slice.call(arguments);
      var combined = [fn].concat(thisArgs);

      return (length - arguments.length > 0) ?
        curry(subCurry.apply(this, combined), length - arguments.length):
        subCurry.call(this, combined);
    } else {
      return fn.apply(this, arguments);
    }
  };
};

var fn = function(x, y, z) { return x+y+z; }

var mFn = curry(fn);
console.log(mFn(1)(2, 3));