如何根据JavaScript中的类型将嵌套数组对象更改为对象

如何解决如何根据JavaScript中的类型将嵌套数组对象更改为对象

我想知道如何根据javascript中的键将嵌套数组对象更改为对象

我有对象obj1和obj2，具体取决于键item的类型来更改对象。

function changeObj(obj){
  let result =  obj.reduce(function (acc,item) {
      if(item.items.trim() !== "" && item.key.trim() !== ""){
        acc[item.key] = item.items
        return acc
      }
        return acc
    },{});
  return result;
}
let result = this.changeObj(obj2)
var obj1 = [
 { id:0,items:["SG","AU"],count: 2,key:"countries"},{ id:1,items:["finance"],count: 3 key:"info"} 
]

var obj2 = [
  { id:0,items: "SG",key: "country"},items: "details",key: "info"}
]

Expected Output:

// if items key is array
{
  fields: {
    countries: ["SG","AU",2],info: ["finance",3]
  }
}

//if items key is string

{
  fields: {
    country: "SG",info: "details"
  }
}

解决方法

我认为您的代码未运行的原因是因为对象的格式错误（1和2）。除条件外，您的代码还可以，因为trim()仅适用于字符串类型，因此在数组上出错。试试这个代码片段

function changeObj(obj){
  let result =  obj.reduce(function (acc,item) {
      acc[item.key] = item.items;
      return acc;
    },{});
  return result;
}

var obj1 = [
 { id:0,items:["SG","AU"],count: 2,key:"countries"},{ id:1,items:["finance"],count: 3,key:"info"} 
]

var obj2 = [
  { id:0,items: "SG",key: "country"},items: "details",key: "info"}
]

console.log(changeObj(obj1));

,

const changeObj = obj =>
  obj.reduce((acc,item) => {
    if (Array.isArray(item.items)) {
      acc[item.key] = [...item.items,item.count];
    } else {
      acc[item.key] = item.items;
    }
    return acc;
  },{});

var obj1 = [
  { id: 0,items: ['SG','AU'],key: 'countries' },{ id: 1,items: ['finance'],key: 'info' }
];

var obj2 = [
  { id: 0,items: 'SG',key: 'country' },items: 'details',key: 'info' }
];

console.log(changeObj(obj1));
console.log(changeObj(obj2));

或清理更多

const changeObj = obj =>
  obj.reduce((acc,{ items,key,count }) => {
    Array.isArray(items) ? (acc[key] = [...items,count]) : (acc[key] = items);

    return acc;
  },key: 'info' }
];

console.log(changeObj(obj1));
console.log(changeObj(obj2));