date-fns/esm/fp/_lib/convertToFP/index.js

Modern JavaScript date utility library

export default function convertToFP(fn, arity, a) {
  a = a || [];

  if (a.length >= arity) {
    return fn.apply(null, a.slice(0, arity).reverse());
  }

  return function () {
    var args = Array.prototype.slice.call(arguments);
    return convertToFP(fn, arity, a.concat(args));
  };
}