javascript - jquery中查找数组和对象的公共(public)键

Question

我有 2 个具有相似值的数组。我想要的是获得数组和对象的交集 -

第一个对象的 console.log 是 -

{  
   "1221":{  
      "oldPrice":{  
         "amount":75
      },
      "basePrice":{  
         "amount":75
      },
      "finalPrice":{  
         "amount":75
      },
      "tierPrices":[  

      ]
   },
   "1222":{  
      "oldPrice":{  
         "amount":75
      },
      "basePrice":{  
         "amount":75
      },
      "finalPrice":{  
         "amount":75
      },
      "tierPrices":[  

      ]
   },
   "1223":{  
      "oldPrice":{  
         "amount":75
      },
      "basePrice":{  
         "amount":75
      },
      "finalPrice":{  
         "amount":75
      },
      "tierPrices":[  

      ]
   },
   "1224":{  
      "oldPrice":{  
         "amount":80
      },
      "basePrice":{  
         "amount":80
      },
      "finalPrice":{  
         "amount":80
      },
      "tierPrices":[  

      ]
   }
}

第二个数组的 console.log 是 -

[["1222","1223","1224"]]

基本上，我想获取第一个对象，其 ids 等于第二个数组，即 1222、1223 和 1224。

我尝试过使用inArray，但它不起作用。

Answer 1

您可以使用Array.reduce和 Object.assign

let obj = {"1221":{"oldPrice":{"amount":75},"basePrice":{"amount":75},"finalPrice":{"amount":75},"tierPrices":[]},"1222":{"oldPrice":{"amount":75},"basePrice":{"amount":75},"finalPrice":{"amount":75},"tierPrices":[]},"1223":{"oldPrice":{"amount":75},"basePrice":{"amount":75},"finalPrice":{"amount":75},"tierPrices":[]},"1224":{"oldPrice":{"amount":80},"basePrice":{"amount":80},"finalPrice":{"amount":80},"tierPrices":[]}};

let arr = [["1222","1223","1224"]];

let result = arr[0].reduce((a,c) => Object.assign(a, {[c] : obj[c]}), {});
console.log(result);

注意:如果array中有一个条目在object中丢失，您可以将代码更新为以下

let obj = {"1221":{"oldPrice":{"amount":75},"basePrice":{"amount":75},"finalPrice":{"amount":75},"tierPrices":[]},"1222":{"oldPrice":{"amount":75},"basePrice":{"amount":75},"finalPrice":{"amount":75},"tierPrices":[]},"1223":{"oldPrice":{"amount":75},"basePrice":{"amount":75},"finalPrice":{"amount":75},"tierPrices":[]},"1224":{"oldPrice":{"amount":80},"basePrice":{"amount":80},"finalPrice":{"amount":80},"tierPrices":[]}};

let arr = [["missing_entry_from_obj", "1222","1223","1224"]];

let result = arr[0].reduce((a,c) => {if(obj[c]) a[c]= obj[c]; return a;}, {});
console.log(result);