javascript - 如果 hashMap 具有相同的键名称，如何获取对象数组中的所有值

Question

我有一个 JSON 结构和代码，如下所示:

const villages = 
    {
    "lossesOccured":
        [
            {
                "type": "destroyed",
                "affectedOn": "humans",
                "quantity": 120,
                "reliefFund": 100000,
                "location": {
                    "district": "thanjavur",
                    "villageName": "madukkur",
                    "pincode": "614903"
                }
            },
            {
                "type": "physicalDamage",
                "affectedOn": "humans",
                "quantity": 250,
                "reliefFund": 50000,
                "location": {
                    "district": "thanjavur",
                    "villageName": "madukkur",
                    "pincode": "614903"
                }
            }
         ]
    }

const losses = villages.lossesOccured

const myMap = new Map()
const humanMap = new Map()

losses.forEach((data,index) => {
    var keys = data.affectedOn
    var objJSON = new Object();
    for (i = 0; i < keys.length; i++) {
        objJSON[keys] = data;
       }
       myMap.set(objJSON,data)
});

function extactLosses(){
    myMap.forEach(loss => {
        if(loss.affectedOn === "humans"){
            humanMap.set(loss.affectedOn,[loss])
     }

for (var [key, value] of humanMap) {
    console.log(key , value);
 }

从上面的代码来看，由于许多元素中存在相同的键名称(affectedOn)，因此map消除了所有重复项并在输出中仅打印一个。 有没有一种方法可以将键打印为字符串，将值打印为对象数组，而不消除具有相同键名称的对象。 提前致谢。

输出:

预期输出

Answer 1

您似乎只想过滤 LossOccurred 数组以提取人类损失的数组。

const villages = 
    {
    "lossesOccured":
        [
            {
                "type": "destroyed",
                "affectedOn": "humans",
                "quantity": 120,
                "reliefFund": 100000,
                "location": {
                    "district": "thanjavur",
                    "villageName": "madukkur",
                    "pincode": "614903"
                }
            },
            {
                "type": "physicalDamage",
                "affectedOn": "humans",
                "quantity": 250,
                "reliefFund": 50000,
                "location": {
                    "district": "thanjavur",
                    "villageName": "madukkur",
                    "pincode": "614903"
                }
            },
            {
                "type": "physicalDamage",
                "affectedOn": "NOT humans",
                "quantity": 250,
                "reliefFund": 50000,
                "location": {
                    "district": "thanjavur",
                    "villageName": "madukkur",
                    "pincode": "614903"
                }
            }
         ]
    };
    
const humanLosses = villages.lossesOccured.filter(loss => loss.affectedOn == 'humans');

console.log(humanLosses);