javascript - 如何在 Angular 中选择对象列表的不同属性值

Question

<分区>

Answer 1

像这样尝试:

Working Demo

this.result = Array.from(new Set(this.data.map(x => x.acctId)));

或者，

 constructor() {
    this.result = this.GetDistinctValues(this.data, "acctId").map(x => x.acctId);
  }

  GetDistinctValues(Source: Array<any>, FilterKey: string = null): Array<any> {
    let DistinctArray = [];
    try {
      Source.forEach(e => {
        if (FilterKey !== null && FilterKey !== undefined && FilterKey !== "") {
          if (
            DistinctArray.filter(DE => DE[FilterKey] === e[FilterKey]).length <=
            0
          )
            DistinctArray.push(e);
        } else {
          if (DistinctArray.indexOf(e) === -1) DistinctArray.push(e);
        }
      });
    } catch (error) {
      DistinctArray = [];
    }
    return DistinctArray;
  }

Demo 2