Question

我正在尝试计算嵌套JavaScript对象中出现的次数并将其分配给对象。我知道我需要一个for循环但我无法弄清楚每次出现一个值时如何计算。这是我需要计算的对象：

var emmys = {
  "Alex": { drama: "Bob", horror: "Devin", romCom: "Gail", thriller: "Kerry" },
  "Bob": { drama: "Mary", horror: "Hermann", romCom: "Fred", thriller: "Ivy" },
  "Cindy": { drama: "Cindy", horror: "Hermann", romCom: "Bob", thriller: "Bob" },
  "Devin": { drama: "Louise", horror: "John", romCom: "Bob", thriller: "Fred" },
  "Ernest": { drama: "Fred", horror: "Hermann", romCom: "Fred", thriller: "Ivy" },
  "Fred": { drama: "Louise", horror: "Alex", romCom: "Ivy", thriller: "Ivy" }
}

var showVote = {
  drama: {},
  horror: {},
  romCom: {},
  thriller: {}
}

我希望得到这样的东西：

var showVote = {
      drama: { Louise: 2}, //etc
      horror: {Hermann: 3},
      romCom: {},
      thriller: {}
    }

Answer 1

我是那些喜欢原生功能的人之一：

var result = Object.keys(emmys).reduce(function(res,person){
     var movieName ="";
     Object.keys(emmys[person]).forEach( function(key){
         movieName = emmys[person][key];
         if (!res[key][movieName]){ res[key][movieName] = 0; }
         res[key][movieName] += 1;
     });
     return res;
 }, {drama: {},horror: {},romCom: {},thriller: {}});

我尝试使用一些描述性名称，但我不确定它们是否正确：）

计算值嵌套的javaScript对象

1 个答案: