如何有条件地获取数组中所有对象的键的联合？

const array = [
  { name: 'Alice', age: 25, gender: 'female' },
  { name: 'Bob', age: 30, gender: 'male' },
  { name: 'Charlie', age: 35, gender: 'male' }
];

const condition = 'age > 25'; // 设置条件，例如年龄大于25

const keysUnion = [];

array.forEach(obj => {
  const keys = Object.keys(obj);
  if (eval(condition)) { // 使用eval()函数动态执行条件判断
    keysUnion.push(...keys);
  }
});

const uniqueKeysUnion = [...new Set(keysUnion)]; // 去除重复的键

const result = uniqueKeysUnion.join(', '); // 将键联合成字符串

console.log(result); // 输出结果：name, age, gender