JavaScript에서 개체에 대한 사용자 정의 `filter()` 메서드를 구현하는 방법은 무엇입니까?

Object.filter = (obj, predicate) =>
  Object.keys(obj)
    .filter(key => predicate(obj[key]))
    .reduce((res, key) => (res[key] = obj[key], res), {});

// Example:
const scores = {
  John: 2,
  Sarah: 3,
  Janet: 1
};
const filtered = Object.filter(scores, score => score > 1);
console.log(filtered);

Object.filter = (obj, predicate) =>
  Object.keys(obj)
    .filter(key => predicate(obj[key]))
    .reduce((res, key) => Object.assign(res, { [key]: obj[key] }), {});

// Example: same as above

Object.filter = (obj, predicate) =>
  Object.fromEntries(
    Object.entries(obj)
      .filter(([key, value]) => predicate(value))
      .map(([key, value]) => [key, value])
  );

// Example: same as above

Object.filter = (obj, predicate) =>
  Object.fromEntries(
    Object.entries(obj).filter(([key, value]) => predicate(value))
  );

// Example: same as above