根据reactjs中的值获取唯一键

Question

我有以下对象：

{
  "Size": {
    "L": [
      "Men clothing",
      "Women clothing",
      "Toys"
    ],
    "M": [
      "Women clothing"
    ]
  }
}

我正在尝试创建一个函数，该函数返回包含给定类别的大小键。

例如，当我传递Men clothing时，我需要期望函数返回["L"]。我通过Men clothing和Women clothing，我需要结果为["L", "M"]。

Answer 1

有多种方法来获取包含给定字符串的键。这是其中之一：

const collection = {
  "Size": {
    "L": [
      "Men clothing",
      "Women clothing",
      "Toys"
    ],
    "M": [
      "Women clothing"
    ]
  }
}

function getSizes(obj, categories) {
  return Object.keys(obj).filter(key => {
    return categories.some(category => obj[key].includes(category));
  });
}

console.log(getSizes(collection.Size, ['Men clothing']));
console.log(getSizes(collection.Size, ['Men clothing', 'Women clothing']));