如果hashMap具有相同的键名，如何获取对象数组中的所有值

Question

I have a JSON structure and code like below :

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);
 }

From the above code,since there are same key names(affectedOn) in many elements, map eliminates all duplicates and prints only one in the output. Is there a way to print the key as string and value as array of objects without eliminating the ones with the same key name. Thanks in advance.

Output:

Expected Output

Answer 1

It seems like you just want to filter the lossesOccurred array to pull out the ones that were human losses.

 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);