Arity From Callback

ArityFromCallback.js

const ArityWithCallback = function (callback) {

	// callback length is number of arguments
	// that callback can accept before
	// it has to be called
	const arity = callback.length;
	const storage = Array.isArray(this) ? this : [];

	if (arity === 0) {
		return callback;
	}

	const acceptArity = (...args) => {

		storage.push(...args);

		if (storage.length < arity) {
			return ArityWithCallback.call(storage, callback);
		}

		// calculation
		const result = callback(...storage.slice(0, arity));
		// storage cleanup
		storage.length = 0;
		return result;
	};

	return acceptArity;
};

const func = (a, b, c, d, e) => a + b + c + d + e;

const hof = ArityWithCallback(func);

console.log(hof(1, 2, 3, 4, 5)); // 15
console.log(hof(2, 3, 4)(5, 6)); // 20
console.log(hof(3, 4)(5, 6)(7)); // 25
console.log(hof(4, 5)(6)(7, 8)); // 30
console.log(hof(5)(6)(7)(8)(9)); // 35

ArityWithCallbackArrow.js

const ArityWithCallbackArrow = (callback, storage = []) => {

	// callback length is number of arguments
	// that callback can accept before
	// it has to be called
	const arity = callback.length;

	if (arity === 0) {
		return callback;
	}

	const acceptArity = (...args) => {

		storage.push(...args);

		if (storage.length < arity) {
			return ArityWithCallbackArrow(callback, storage);
		}

		// calculation
		const result = callback(...storage.slice(0, arity));
		// storage cleanup
		storage.length = 0;
		return result;
	};

	return acceptArity;
};

const hof2 = ArityWithCallback(func);

console.log(hof2(1, 2, 3, 4, 5)); // 15
console.log(hof2(2, 3, 4)(5, 6)); // 20
console.log(hof2(3, 4)(5, 6)(7)); // 25
console.log(hof2(4, 5)(6)(7, 8)); // 30
console.log(hof2(5)(6)(7)(8)(9)); // 35

much better here )

omg-curry/fixed.js at master · Debdut/omg-curry
https://github.com/Debdut/omg-curry/blob/master/src/fixed.js

function fixed (f) {
  return function next (...a) {
    if (a.length < f.length) {
      return function (...b) {
        return next(...a, ...b)
      }
    }
    return f(...a)
  }
}

export default fixed