javascript - 在 Javascript 中解构对象字段并计算总和

Question

我无法弄清楚如何解构和添加具有字段的对象的总和。以前我们在对象数组中损坏了单独的对象。现在它们被汇总为 1 个对象，如下所示:

{
  "3" {
   petIds:{
    "113": {"estimatedEats": 10, "owners": {"female":{"kids":1, "adult":2, "senior":10}}, "male":{"kids":1, "adult":2, "senior":10}}
     "9": {"estimatedEats": 1, owners: {…}}}

  "6":{
   petIds:{
     "113": {"estimatedEats": 5, "owners": {…}}
     "9": {"estimatedEats": 6, "owners": {…}}
     "1": {"estimatedEats": 7, "owners": {…}}}
  }

以前我可以映射对象数组。我希望最终得到一个如下所示的对象数组:

[{petIds:113, "estimatedEats":15, "owners": (sum of owner description)}...]

有没有办法可以将每个字段转换为对象数组？我认为这样做并映射数组对我来说会更容易。

Answer 1

这应该可以帮助您开始:

var x = {
  3:{
   petIds:{
    113: {estimatedEats: 10, owners: {}},
     9: {estimatedEats: 1, owners: {}}
   }
  },
  6:{
   petIds:{
     113: {"estimatedEats": 5, "owners": {}},
     9: {"estimatedEats": 6, "owners": {}},
     1: {"estimatedEats": 7, "owners": {}}
   }
  }
};

var pets = [];
Object.keys(x).forEach(function(key) {
    var y = x[key];
    Object.keys(y).forEach(function(objKey) {
        if(objKey === 'petIds'){
          var z = y[objKey];
          Object.keys(z).forEach(function(petKey) {
            var pet = Object.assign({},z[petKey]);
            pet.id = parseInt(petKey);
            pets.push(pet);
          });
        };
    });
});

var sumPets = [];

pets.forEach(function(p){
  var idx = sumPets.findIndex(function(i){
    return i.id === p.id;
  });

  if(idx < 0){
    sumPets.push(p);
  } else {
    sumPets[idx].estimatedEats = sumPets[idx].estimatedEats + p.estimatedEats;
  }
});

console.log(sumPets);