为什么我的对象键值对被覆盖而不是创建新的键值对？

雅各布·韦斯特

我正在尝试使用动态创建的键，值对在对象内创建对象的对象，但是嵌套的对象会不断覆盖键值对，而不是创建新的键值对。

ObjectIDWithQuestions = {};
var ArrayOfBlocks1 = [
  {
    ID: "block1",
    block: "block1",
    BlockElements: [
      { QuestionID: "1"  },
      { QuestionID: "2"  }
    ]
  },
  {
    ID: "block2",
    block: "block2",
    BlockElements: [
      {  QuestionID: "1"  },
      {  QuestionID: "2"  }
    ]
  },
  {
    ID: "block3",
    block: "block3",
    BlockElements: [
      {  QuestionID: "1"  },
      {  QuestionID: "2"  }
    ]
      }
];

for(i=0;i<ArrayOfBlocks1.length;i++){
    for(k=0;k<ArrayOfBlocks1[i].BlockElements.length;k++){
        var ArrayOfBlocks2 = ArrayOfBlocks1[i].ID
        ObjectIDWithQuestions[ArrayOfBlocks2]={}
        ObjectIDWithQuestions[""+ArrayOfBlocks2]["questions"+ k]=ArrayOfBlocks1[i].BlockElements[k].QuestionID

    }
}
console.log(ObjectIDWithQuestions);

该代码的预期结果是创建一个对象，该对象是具有两个动态创建的键值对而不是被覆盖的一个键值对的对象的对象，例如，打印以下代码：

block1: {questions1: "2"}
block2: {questions1: "2"}
block3: {questions1: "2"}

什么时候应该打印

block1: {questions0: "1",questions1:"2"}
block2: {questions0: "1",questions1:"2"}
block3: {questions0: "1",questions1:"2"}

Vineesh

你应该初始化

var ArrayOfBlocks2 = ArrayOfBlocks1[i].ID
ObjectIDWithQuestions[ArrayOfBlocks2]={}

在内循环之外。否则，每次内部循环迭代时，它将创建一个对象

ObjectIDWithQuestions = {};
var ArrayOfBlocks1 = [
  {
    ID: "block1",
    block: "block1",
    BlockElements: [
      { QuestionID: "1"  },
      { QuestionID: "2"  }
    ]
  },
  {
    ID: "block2",
    block: "block2",
    BlockElements: [
      {  QuestionID: "1"  },
      {  QuestionID: "2"  }
    ]
  },
  {
    ID: "block3",
    block: "block3",
    BlockElements: [
      {  QuestionID: "1"  },
      {  QuestionID: "2"  }
    ]
      }
];

for(i=0;i<ArrayOfBlocks1.length;i++){
     var ArrayOfBlocks2 = ArrayOfBlocks1[i].ID
     ObjectIDWithQuestions[ArrayOfBlocks2]={}
     for(k=0;k<ArrayOfBlocks1[i].BlockElements.length;k++){  
        ObjectIDWithQuestions[""+ArrayOfBlocks2]["questions"+ k]=ArrayOfBlocks1[i].BlockElements[k].QuestionID

     }
}
console.log(ObjectIDWithQuestions);

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