如何求和json对象

时间：2019-01-16 02:49:07

标签： javascript

这是我第一次在这里发布消息，因此，如果缺少任何内容或没有太多信息，请告诉我。我在旅途中学习。

我从API提取了一些数据，现在我需要整理所有数据，因此最终我将只保留键和每个键的总值。

我需要每个Version=1.0.12205.0求和每个区域内storeArea和boysTotal的所有值，所以看起来像这样：girlsTotal，{{1} }

我首先映射[area1并为每个区域提出了3个不同的对象，然后尝试将所有3193745.7189541734]和json合并为一个数组，这样我就可以将一个数组的总数相加具有减少功能，但我肯定错过了一些重要的事情。它是什么？感谢您的帮助！

boysTotal

5 个答案:

答案 0 :(得分：2)

使用map和reduce是可行的方法，但是您必须map进入stores，reduce进入totalStore：< / p> 

const json={"stores":[{"storeArea":"area1","totalStore":[{"date":"2018-10-01","boysTotal":1082220.3945979946,"girlsTotal":9585.8794674401543},{"date":"2018-11-01","boysTotal":1056643.6756958894,"girlsTotal":11018.898987932616},{"date":"2018-12-01","boysTotal":1022322.1218654147,"girlsTotal":11954.748339502334}]},{"storeArea":"area2","totalStore":[{"date":"2018-10-01","boysTotal":91336.329372028267,"girlsTotal":0},{"date":"2018-11-01","boysTotal":78130.417193652393,"girlsTotal":0},{"date":"2018-12-01","boysTotal":100755.62136033915,"girlsTotal":0}]},{"storeArea":"area3","totalStore":[{"date":"2018-10-01","boysTotal":66604.417069221658,"girlsTotal":0},{"date":"2018-11-01","boysTotal":63882.129662868538,"girlsTotal":0},{"date":"2018-12-01","boysTotal":108781.84734382466,"girlsTotal":0}]},{"storeArea":"area4","totalStore":[{"date":"2018-10-01","boysTotal":0,"girlsTotal":1452.6775522557543},{"date":"2018-11-01","boysTotal":0,"girlsTotal":2366.423254655545},{"date":"2018-12-01","boysTotal":0,"girlsTotal":3485.5840149129986}]},{"storeArea":"area5","totalStore":[{"date":"2018-10-01","boysTotal":3237887.746893588,"girlsTotal":0},{"date":"2018-11-01","boysTotal":3218724.4935297123,"girlsTotal":0},{"date":"2018-12-01","boysTotal":2925562.2916941536,"girlsTotal":0}]},{"storeArea":"area6","totalStore":[{"date":"2018-10-01","boysTotal":291293.35185208195,"girlsTotal":0},{"date":"2018-11-01","boysTotal":171962.47103846565,"girlsTotal":0},{"date":"2018-12-01","boysTotal":95615.439855929668,"girlsTotal":0}]}]}

const resp = json.stores.map(store => ([store.storeArea, store.totalStore.reduce((a, e) => a + e.boysTotal + e.girlsTotal, 0)]))

console.log(resp);

答案 1 :(得分：0)

var results = [];

var json = {
"stores": [
  {
    "storeArea": "area1",
    "totalStore": [
      {
        "date": "2018-10-01",
        "boysTotal": 1082220.3945979946,
        "girlsTotal": 9585.8794674401543
      },
      {
        "date": "2018-11-01",
        "boysTotal": 1056643.6756958894,
        "girlsTotal": 11018.898987932616
      },
      {
        "date": "2018-12-01",
        "boysTotal": 1022322.1218654147,
        "girlsTotal": 11954.748339502334
      }
    ]
  },
  {
    "storeArea": "area2",
    "totalStore": [
      {
        "date": "2018-10-01",
        "boysTotal": 91336.329372028267,
        "girlsTotal": 0
      },
      {
        "date": "2018-11-01",
        "boysTotal": 78130.417193652393,
        "girlsTotal": 0
      },
      {
        "date": "2018-12-01",
        "boysTotal": 100755.62136033915,
        "girlsTotal": 0
      }
    ]
  },
  {
    "storeArea": "area3",
    "totalStore": [
      {
        "date": "2018-10-01",
        "boysTotal": 66604.417069221658,
        "girlsTotal": 0
      },
      {
        "date": "2018-11-01",
        "boysTotal": 63882.129662868538,
        "girlsTotal": 0
      },
      {
        "date": "2018-12-01",
        "boysTotal": 108781.84734382466,
        "girlsTotal": 0
      }
    ]
  },
  {
    "storeArea": "area4",
    "totalStore": [
      {
        "date": "2018-10-01",
        "boysTotal": 0,
        "girlsTotal": 1452.6775522557543
      },
      {
        "date": "2018-11-01",
        "boysTotal": 0,
        "girlsTotal": 2366.423254655545
      },
      {
        "date": "2018-12-01",
        "boysTotal": 0,
        "girlsTotal": 3485.5840149129986
      }
    ]
  },
  {
    "storeArea": "area5",
    "totalStore": [
      {
        "date": "2018-10-01",
        "boysTotal": 3237887.746893588,
        "girlsTotal": 0
      },
      {
        "date": "2018-11-01",
        "boysTotal": 3218724.4935297123,
        "girlsTotal": 0
      },
      {
        "date": "2018-12-01",
        "boysTotal": 2925562.2916941536,
        "girlsTotal": 0
      }
    ]
  },
  {
    "storeArea": "area6",
    "totalStore": [
      {
        "date": "2018-10-01",
        "boysTotal": 291293.35185208195,
        "girlsTotal": 0
      },
      {
        "date": "2018-11-01",
        "boysTotal": 171962.47103846565,
        "girlsTotal": 0
      },
      {
        "date": "2018-12-01",
        "boysTotal": 95615.439855929668,
        "girlsTotal": 0
      }
    ]
  }
]
}

var i = 0;

for (i=0; i<json.stores.length; i++) {
  var store = json.stores[i];

  var j = 0;

  var boysTotal = 0;
  var girlsTotal = 0;

  var result = [];

  for (j=0; j<store.totalStore.length; j++) {
    boysTotal += parseFloat(store.totalStore[j]['boysTotal']);
    girlsTotal += parseFloat(store.totalStore[j]['girlsTotal']);
  }

  results[i] = [];
  results[i][0] = store.storeArea;
  results[i][1] = boysTotal + girlsTotal;
  //results[i][1] = boysTotal;
  //results[i][2] = girlsTotal;

}

console.log(results);

答案 2 :(得分：0)

以下代码段将完成工作：

json.stores.forEach(function(x){
     var totalboys=0, totalgirls = 0; // for clarity & flexibility
     x.totalStore.forEach(function(y){
        totalboys += y.boysTotal;
        totalgirls += y.girlsTotal;
     })
     results[x.storeArea] = totalboys + totalgirls;
     console.log(results[x.storeArea])
})

查看实际情况jsfiddle

答案 3 :(得分：0)

使用面向对象怎么样？ json代表商店，总数组代表天数。使用store json来构建商店。反过来，其构造函数会构建一系列数组。我们教商店如何自我合计（减少每天的总数），并教商店如何自我合计（通过增加男孩和女孩的总数）。

class StoreDay {
    constructor(json) {
        this.date = new Date(json.date);
        this.boysTotal = json.boysTotal;
        this.girlsTotal = json.girlsTotal;
    }
    total() {
        return this.boysTotal+this.girlsTotal;
    }
}

class Store {
    constructor(json) {
        this.storeArea = json.storeArea;
        this.days = json.totalStore.map(day => new StoreDay(day));
    }
    
    total() {
        return this.days.reduce((acc, day) => acc + day.total(), 0);
    }
}




var json = {
"stores": [
    {
        "storeArea": "area1",
        "totalStore": [
            {
                "date": "2018-10-01",
                "boysTotal": 1082220.3945979946,
                "girlsTotal": 9585.8794674401543
            },
            {
                "date": "2018-11-01",
                "boysTotal": 1056643.6756958894,
                "girlsTotal": 11018.898987932616
            },
            {
                "date": "2018-12-01",
                "boysTotal": 1022322.1218654147,
                "girlsTotal": 11954.748339502334
            }
        ]
    },
    {
        "storeArea": "area2",
        "totalStore": [
            {
                "date": "2018-10-01",
                "boysTotal": 91336.329372028267,
                "girlsTotal": 0
            },
            {
                "date": "2018-11-01",
                "boysTotal": 78130.417193652393,
                "girlsTotal": 0
            },
            {
                "date": "2018-12-01",
                "boysTotal": 100755.62136033915,
                "girlsTotal": 0
            }
        ]
    },
    {
        "storeArea": "area3",
        "totalStore": [
            {
                "date": "2018-10-01",
                "boysTotal": 66604.417069221658,
                "girlsTotal": 0
            },
            {
                "date": "2018-11-01",
                "boysTotal": 63882.129662868538,
                "girlsTotal": 0
            },
            {
                "date": "2018-12-01",
                "boysTotal": 108781.84734382466,
                "girlsTotal": 0
            }
        ]
    },
    {
        "storeArea": "area4",
        "totalStore": [
            {
                "date": "2018-10-01",
                "boysTotal": 0,
                "girlsTotal": 1452.6775522557543
            },
            {
                "date": "2018-11-01",
                "boysTotal": 0,
                "girlsTotal": 2366.423254655545
            },
            {
                "date": "2018-12-01",
                "boysTotal": 0,
                "girlsTotal": 3485.5840149129986
            }
        ]
    },
    {
        "storeArea": "area5",
        "totalStore": [
            {
                "date": "2018-10-01",
                "boysTotal": 3237887.746893588,
                "girlsTotal": 0
            },
            {
                "date": "2018-11-01",
                "boysTotal": 3218724.4935297123,
                "girlsTotal": 0
            },
            {
                "date": "2018-12-01",
                "boysTotal": 2925562.2916941536,
                "girlsTotal": 0
            }
        ]
    },
    {
        "storeArea": "area6",
        "totalStore": [
            {
                "date": "2018-10-01",
                "boysTotal": 291293.35185208195,
                "girlsTotal": 0
            },
            {
                "date": "2018-11-01",
                "boysTotal": 171962.47103846565,
                "girlsTotal": 0
            },
            {
                "date": "2018-12-01",
                "boysTotal": 95615.439855929668,
                "girlsTotal": 0
            }
        ]
    }
]
};

let stores = json.stores.map(s => new Store(s));
let totals = stores.map(store => {
    return [store.storeArea, store.total()];
});
console.log(totals);

答案 4 :(得分：-2)

您可以使用loadsh对json对象和数组执行操作。

https://lodash.com/docs/

这是减少每个唯一元素的情况。

我总是使用_.groupBy，然后在应用约简后将_.map映射到数组。在这种情况下，归约运算为_.sumBy。

var obj = [ {"name":"Jack ProjManager","count":12000}, {"name":"Jack ProjManager","count":750000}, {"name":"Joe ProjManager","count":45000} ]; 

var output = _(obj) .groupBy('name') .map((objs, key) => ({ 'name': key, 'count': _.sumBy(objs, 'count') })) .value(); console.log(output);
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