Angular 分组并合并数组

Question

1

我正在尝试合并数组中的重复值对象，但无法正常工作... I have my result like this

but I want my data like this help me pls

这是我的代码

-

     dataa = [
           {
             date: '07/05/2020 00:09',
             id: '5920501995',
             score: 0,
             student: 'boon boon',
           },
          ....] 
source = from(this.dataa);
//group by age
 example = this.source.pipe(
  groupBy(person => person.id),
  // return each item in group as array
  mergeMap(group => group.pipe(toArray())));
 subscribe = this.example.subscribe(val => console.log(val));
 -

Answer 1

您可以推送到另一个变量而不是记录日志

const values= [];
const subscribe = example.subscribe(val => {
values.push(val);
});

Angular 分组并合并数组

Angular groupby and merge array

toarray

angular

mergemap