object 數組中的 map 數據如何？

Question

LH 和 KR 是我的城市名稱，我想要一個相應的子數組，我想遍歷這些子數組我該怎么辦？

{
  "LH": [
    "xyz",
    "CDE",
    "qwe"
  ],
  "KR": [
    "ABC",
    "xyz"
  ]
}

Answer 1

只需打印每個城市下的項目，您可以使用以下內容：

const cities = ['LH', 'KR'];
cities.forEach(item => console.log(...first[item]));

迭代內部數組：

cities.forEach(item => first[item].forEach(innerItem => console.log(innerItem)));

Answer 2

我不確定您希望生成的數據是什么樣的，但這里有幾個選項：

 const data = { "LH": [ "xyz", "CDE", "qwe" ], "KR": [ "ABC", "xyz" ] } const getResult = (city) => data[city].map(d => d) console.log("Result for LH", getResult("LH")) console.log("Result for KR", getResult("KR")) // OR to get an array of both arrays: const getDataForAllCities = Object.keys(data).map(city => data[city].map(d => d)); console.log(getDataForAllCities)