var arr = [{name:'1',age:10},{name:'2',age:20},{name:'3',age:30}]

var arr1 = {name:['1','2','3'],age:[10,20,30]}

如何把arr 转换成 arr1这样的。提供一下思路也行

[{name:'1',age:10},{name:'2',age:20},{name:'3',age:30}].reduce((res, item) => {
    res.name.push(item.name);
    res.age.push(item.age); 
    return res; 
}, {name: [], age: []});

arrname = arr.map(item => item.name)
arrage = arr.map(item => item.age)
arr1 = { name:arrname, age:arrage }

convertArray([{name:'1',age:10},{name:'2',age:20},{name:'3',age:30}])

function convertArray (list) {
  let query = {}
  list.forEach(item => {
    for(let key in item) {
      query[key] = query[key] || []
      query[key].push(item[key])
    }
  })
  return query
}

arr.reduce((res, cur) => {
    Object.keys(cur).forEach(key => {
        res[key] = res[key] || [];
        res[key].push(cur[key]);
    })
    return res;
}, {})

1. 循环遍历arr
2. 根据Object.keys拿到每个key
3. 判断arr1中对应key是否有值
4. 有就肯定是数组， push
5. 没有就 设置成数组 [data]

先Object.keys取数组中所有key。然后遍历。

       let keys=Object.keys(arr[0])
       const data= keys.map(item=>{
          let b=arr.map(item1=>item1[item])
            return {[item]:b}
        })

var arr = [{name:'1',age:10},{name:'2',age:20},{name:'3',age:30}];
var arr1 = arr.reduce((result,current)=>{
    Object.getOwnPropertyNames(current).forEach((propertyName)=>{
        result[propertyName]=result[propertyName]||[];
        result[propertyName].push(current[propertyName]);
    });
    return result;
},{});
console.log(arr1);