如何 Map 这个对象数组从每个产品项目中获取新的地理数组？

Question

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}]}]}

Answer 1

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