如何映射此对象数组以从每个产品项中获取新的地理数组？ [英] How to Map this Array of objects to get a new array of geos from each products items?

问题描述

我需要从此产品对象中获取itmes属性内所有geos的新数组。我该怎么做？

I need to get a new array from this products object, of all the geos inside itmes property. how i can do that?

"products":[{"code":"realestate","currency":"ILS","percentage":1,"totalWorth":150000,"totalYieldPer":0,"items":[{"name":"הבית שלנו בחיפה ","currency":"NIS","geo":"ישראל","worth":150000,"portfolioPer":0.022,"yield":0,"yieldPer":0},{"name":"הבית שלנו בארהבב","currency":"USD","geo":"ארהב","worth":5261700,"portfolioPer":0.761,"yield":0,"yieldPer":0},{"name":"דירהב אירופה","currency":"NIS","geo":"אירופה","worth":5261700,"portfolioPer":0.761,"yield":0,"yieldPer":0}]}]}

推荐答案

以下是使用 Array.prototype.flatMap 和 Array.prototype。地图 ：

Here is a solution using Array.prototype.flatMap and Array.prototype.map:

const obj = {
    "products": [{
            "code": "realestate",
            "currency": "ILS",
            "percentage": 1,
            "totalWorth": 150000,
            "totalYieldPer": 0,
            "items": [{
                    "name": "הבית שלנו בחיפה ",
                    "currency": "NIS",
                    "geo": "ישראל",
                    "worth": 150000,
                    "portfolioPer": 0.022,
                    "yield": 0,
                    "yieldPer": 0
                }, {
                    "name": "הבית שלנו בארהבב",
                    "currency": "USD",
                    "geo": "ארהב",
                    "worth": 5261700,
                    "portfolioPer": 0.761,
                    "yield": 0,
                    "yieldPer": 0
                }, {
                    "name": "דירהב אירופה",
                    "currency": "NIS",
                    "geo": "אירופה",
                    "worth": 5261700,
                    "portfolioPer": 0.761,
                    "yield": 0,
                    "yieldPer": 0
                }
            ]
        }, {
            "items": [{ "geo": "Some other geo" }]
        }
    ]
};

const result = obj.products.flatMap(({ items }) => items).map(({ geo }) => geo);

console.log(result);

I' m假设您的源对象在产品数组中包含多个项目，因此我为示例添加了一个项目。

I'm assuming that your source object contains more than one item in the products array, so I added one for the example.

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