如何过滤嵌套数组并计算时间差

// 嵌套数组
const nestedArray = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9]
];

// 1. 将嵌套数组转换为一维数组
const flatArray = nestedArray.flat();

// 2. 过滤数组
const filteredArray = flatArray.filter(element => element > 5);

// 3. 计算时间差
const dateArray = ['2022-01-01', '2022-01-02', '2022-01-03'];
const timestampArray = dateArray.map(date => new Date(date).getTime());

// 计算时间差
const timeDifference = timestampArray[1] - timestampArray[0];

console.log(filteredArray); // 输出: [6, 7, 8, 9]
console.log(timeDifference); // 输出: 时间差的毫秒数