如何在ES6中使用对象的值过滤对象

const obj = { 
  name: 'Alice', 
  age: 20, 
  gender: 'female' 
};

const filteredObj = Object.entries(obj)
  .filter(([key, value]) => value === 'female')
  .reduce((acc, [key, value]) => ({ ...acc, [key]: value }), {});

console.log(filteredObj);  // 输出 { gender: 'female' }

const obj = { 
  name: 'Alice', 
  age: 20, 
  gender: 'female' 
};

const filteredObj = {};
for (let key in obj) {
  if (obj[key] === 'female') {
    filteredObj[key] = obj[key];
  }
}

console.log(filteredObj);  // 输出 { gender: 'female' }