z-utils-ts/src/lib/associativeArray.js

使用TypeScript编写的工具函数库

// 用户信息数组
var users = [
    { id: 1, name: 'Alice' },
    { id: 2, name: 'Bob' },
    { id: 3, name: 'Charlie' }
];
// 订单信息数组
var orders = [
    {  userId: 1, product: 'Laptop' },
    {  userId: 1, product: 'Mouse' },
    {  userId: 2, product: 'Keyboard' },
    {  userId: 3, product: 'Monitor' }
];
function associativeArray(arr1, arr2, key1, key2, prefixKey = '$') {
    let arr2Map = {};
    for (let i = 0; i < arr2.length; i++) {
        arr2Map[arr2[i][key2]] = arr2[i];
    }

    let result = arr1.map((item) => {
        let newItem = item;
        let user = arr2Map[item[key1]];
        if(user) {
            for(let key in user) {
                if(key === key2) continue;
                newItem[prefixKey + key] = user[key];
            }
        }
        return newItem;
    });
    return result;
}
var data = associativeArray(users, orders, 'id', 'userId');
console.log("🚀 ~ data:", data);