typescript中的条件过滤

const numbers: number[] = [1, 2, 3, 4, 5];
const evenNumbers = numbers.filter(num => num % 2 === 0);
console.log(evenNumbers); // 输出 [2, 4]

interface User {
  id: number;
  name: string;
  age: number;
}

const users: User[] = [
  { id: 1, name: 'Alice', age: 25 },
  { id: 2, name: 'Bob', age: 30 },
  { id: 3, name: 'Charlie', age: 20 }
];

const adults = users.filter(user => user.age >= 18);
console.log(adults); // 输出 [{ id: 1, name: 'Alice', age: 25 }, { id: 2, name: 'Bob', age: 30 }]

const numbers: number[] = [1, 2, 3, 4, 5];
const filteredNumbers = numbers.filter(num => num > 2 && num % 2 === 0);
console.log(filteredNumbers); // 输出 [4]