fp-varadocCurry

fp-varadocCurry

/**
 *
 * @param varadocCurry
 *
 * @usage
 * const toSum = varadocCurry((x, y) => x + y, 0);
 * const toMul = varadocCurry((x, y) => x * y, 1);
 *
 * toSum(1)(1, 2)(3, 4)(5, 6, 7)(); // 29
 * toMul(1)(1, 2)(3, 4); // 24
 *
 */
export const varadocCurry = (fn, seed) => {
  const value = (args, seedValue) => args.reduce((acc, a) => fn.call(fn, acc, a), seedValue);

  const next = (...args) => (...x) => {
    if (!x.length) {
      return value(args, seed);
    }
    return next(...args, value(x, seed));
  };

  return next();
};