Question

我正在尝试几种方法来对abjects json数组进行分组，但是我做不到，这是初始数组：

{_id: "455", name: "ALBACETE"}
{_id: "455", name: "ALLICANTE"}
{zone: {_id: "zone1", name: "zone1"}, _id: "143", name: "ALCALA"}
{zone: {_id: "zone1", name: "zone1"}, _id: "144", name: "OTRO"}
{zone: {_id: "zone2", name: "zone2"}, _id: "144", name: "OTRO MAS"}

也就是说，数组中的某些元素没有区域，其他则没有。

我希望得到这样的结果：

{_id: "455", name: "ALBACETE"}
{_id: "455", name: "ALLICANTE"}
{zone: {_id: "zone1", name: "zone1"}, _id: "144", name: "OTRO"}
{zone: {_id: "zone2", name: "zone2"}, _id: "144", name: "OTRO MAS"}

也就是说，它按区域分组（不重复区域1）。

请有人帮助我！尝试许多我做不到的方法。

我尝试：

const q = [
     { zone: { _id: "zone1", name: "zone1" }, _id: "143", name: "ALCALA" },
     { zone: { _id: "zone1", name: "zone1" }, _id: "144", name: "OTRO" },
     { zone: { _id: "zone2", name: "zone2" }, _id: "144", name: "OTRO MAS" },
     { _id: "455", name: "ALBACETE" }
     {_id: "455", name: "ALLICANTE"}
 ];``


let ret = [];

let result = q.filter( x => {
  if(!ret.includes(x._id)) {
    ret.push(x._id);
    return true;
  }
  return false;
});

But the output does not filter by the object "zone":

[ 
   { zone: { _id: 'zone1', name: 'zone1' }, _id: '143', name: 'ALCALA' },
   { zone: { _id: 'zone1', name: 'zone1' }, _id: '144', name: 'OTRO' },
   { _id: '455', name: 'ALBACETE' }

Answer 1

好的，我已经设法通过这种方式解决问题： forEach遍历数组，JSON.stringify()比较值。

如何将数组对象分组为JSON JavaScript（Angular 5）

1 个答案: