简化javascript中的嵌套循环

const people = [
  { name: 'Alice', age: 25 },
  { name: 'Bob', age: 17 },
  { name: 'Charlie', age: 22 },
  // 更多人...
];

const names = [];
for (let i = 0; i < people.length; i++) {
  if (people[i].age > 18) {
    names.push(people[i].name);
  }
}
console.log(names);  // 输出：["Alice", "Charlie"]

const people = [
  { name: 'Alice', age: 25 },
  { name: 'Bob', age: 17 },
  { name: 'Charlie', age: 22 },
  // 更多人...
];

const names = people
  .filter(person => person.age > 18)  // 过滤年龄大于18岁的人
  .map(person => person.name);        // 取出姓名
console.log(names);  // 输出：["Alice", "Charlie"]