数据处理 筛选

1.题目

 

    const arr =[{key:1,name:12},{key:2,name:12},{key:3,name:3}];

    const arr2 = [{key:1,name:1,data:'1111'},{key:2,name:2,data:'2222'}]; 

将数据处理成 arr3 = [{key:1,name:1,data:'1111'},{key:2,name:2,data:'2222'},{key:3,name:3}]

    let keys=[];

    for(const o of arr2){

      keys.push(o.key);

    }

    console.log('keys',keys);

  const arr3=arr.filter((item)=>{

  console.log('item',keys.indexOf(item.key)>-1);

  if(keys.indexOf(item.key )<=-1){

    return true;

  }

})

console.log('124',arr3,[...arr3,...arr2]);