the reference answer GPT ᴼ ᴾ ᴱ ᴺ ᴬ ᴵ < br / > you can use the JavaScript in the reduce method was carried out on the original array traversal and transformation. Here is a possible solution:
let arr = [
{day: "2021-1-1", day1: '全天', time: "00:00", name: 123},
{day: "2021-1-1", day1: '全天', time: "00:00", name: 456},
{day: "2021-1-1", day1: '非全天', time: "10:00", name: 789},
{day: "2021-1-2", day1: '非全天', time: "10:00", name: 777},
{day: "2021-1-2", day1: '非全天', time: "10:00", name: 888},
];
let List = arr.reduce((result, item) => {
// 根据日期查找是否已经存在该日期的数据
let date = result.find(date => date.day === item.day);
if (!date) {
// 如果不存在，就创建一个新的日期节点
date = {
day: item.day,
children: []
};
result.push(date);
}
// 根据时间查找是否已经存在该时间段的数据
let time = date.children.find(time => time.time === item.time);
if (!time) {
// 如果不存在，就创建一个新的时间段节点
time = {
time: item.time,
children: []
};
date.children.push(time);
}
// 将当前的数据节点添加到时间段节点的子节点数组中
time.children.push({
day: item.day,
day1: item.day1,
time: item.time,
name: item.name
});
return result;
}, []);
console.log(List);
Explain:
- uses reduce method to traverse the original array and returns the converted result;
- For each array element, first find if the date node already exists, and if it does not, create a new date node;
- Finds whether the time period node already exists in the date node, and creates a new time period node if it does not exist;
- Adds the current data node to the array of child nodes of the time period node;
- Finally returns the transformed array.
