javascript - 使用 typescript 合并对象

Question

在我的 Angular 应用程序中，我的数据如下，

  forEachArrayOne = [
    { id: 1, name: "userOne" },
    { id: 2, name: "userTwo" },
    { id: 3, name: "userThree" }
  ]

  forEachArrayTwo = [
    { id: 1, name: "userFour" },
    { id: 2, name: "userFive" },
    { id: 3, name: "userSix" }
  ]

  newObj: any = {};

  ngOnInit() {
this.forEachArrayOne.forEach(element => {
  this.newObj = { titleOne: "objectOne", dataOne: this.forEachArrayOne };
})

this.forEachArrayTwo.forEach(element => {
  this.newObj = { titleTwo: "objectTwo", dataTwo: this.forEachArrayTwo };
})

console.log({ ...this.newObj, ...this.newObj });


  }

在我的实际应用中，以上是结构，请帮助我以相同的方式达到预期的结果..

工作演示 https://stackblitz.com/edit/angular-gyched其结构如上。

这里 console.log(this.newObj) 给出最后一个对象，

   titleTwo: "ObjectTwo",
   dataTwo:
     [
       { id: 1, name: "userFour" },
      { id: 2, name: "userFive" },
      { id: 3, name: "userSix" }
     ]

但我想将两者结合起来，并且需要与下面完全相同的结果..

  {
  titleOne: "objectOne", 
  dataOne:
    [
      { id: 1, name: "userOne" },
      { id: 2, name: "userTwo" },
      { id: 3, name: "userThree" }
    ],
  titleTwo: "ObjectTwo",
  dataTwo:
    [
      { id: 1, name: "userFour" },
      { id: 2, name: "userFive" },
      { id: 3, name: "userSix" }
    ]
}

请帮助我实现上述结果..如果我在任何地方错了，请纠正工作示例..

Answer 1

您将两个值都分配给 this.newObj，因此它只会覆盖第一个对象。

此外，不需要循环。它不添加任何东西。

相反，您可以这样做:

this.newObjA = { titleOne: "objectOne", dataOne: this.forEachArrayOne };
this.newObjB = { titleTwo: "objectTwo", dataTwo: this.forEachArrayTwo };
console.log({ ...this.newObjA, ...this.newObjB });

** 编辑 **

在与您讨论了您的要求后，我可以看到不同的解决方案。

在调用componentData之前，您需要确保您拥有完整的数据。为此，我们可以使用 forkJoin 将基准测试请求和项目请求加入到一个 Observable 中。然后我们可以订阅该 Observable 来获取两者的结果。

代码看起来像这样:

 createComponent() {
    let benchmarks, projects;
    let form = this.productBenchMarkingForm[0];
    if (form.benchmarking && form.project) {
      benchmarks = form.benchmarking.filter(x => x.optionsUrl)
        .map(element => this.getOptions(element));

      projects = form.project.filter(x => x.optionsUrl)
        .map(element => this.getOptions(element));

      forkJoin(
        forkJoin(benchmarks), // Join all the benchmark requests into 1 Observable
        forkJoin(projects) // Join all the project requests into 1 Observable
      ).subscribe(res => {
        this.componentData({ component: NgiProductComponent, inputs: { config: AppConfig, injectData: { action: "add", titleProject: "project", dataProject: this.productBenchMarkingForm[0] } } });
      })
    }
  }

  getOptions(element) {
    return this.appService.getRest(element.optionsUrl).pipe(
      map((res: any) => {
        this.dataForOptions = res.data;
        element.options = res.data;
        return element;
      })
    )
  }

<强> Here is an example in Stackblitz that logs the data to the console