如何过滤对象数组然后返回特定属性？

Question

考虑数据：

let orders = {
        "data": [
            {
                "email": "a@b.com", "orders": [
                    { "orderName": "something", "price": "43$" },
                    { "orderName": "anotherthing", "price": "4$" }
                ]
            },{
                "email": "c@w.com", "orders": [
                    { "orderName": "fish", "price": "43$" },
                    { "orderName": "parrot", "price": "4$" }
                ]
            }
        ]
    };

我正在尝试使用一些电子邮件来过滤对象的订单，例如：

email = 'a@b.com'
x=orders.data.filter(o =>{if (o.email === email) return o.orders});

但整个返回值是整个匹配对象，包括电子邮件和订单，我不需要整个对象，我只想要订单。

Answer 1

你不能filter独自完成，你还需要map：

orders.data.filter(o => o.email === 'a@b.com').map(o => o.orders)