foldr-lazy-hack.js

const foldrLazy = (fn, initialValue, [element, ...rest]) => {
  if (element === undefined) {
    return initialValue;
  }
  const exists = () => foldrShortCircuit(fn, initialValue, rest);
  return fn(element, exists);
};


const someLazy = (fn, arr) =>
  foldrLazy(
    (value, accumulated) => fn(value) || accumulated(),
    false,
    arr
  );