Question

我在函数中有一个简单的订阅observable：

public MyGet () {
   let results={};
   this.http.get("myfile.json").map(res => res.json()).subscribe(
          output => { 
            results=output.clients; // clients is the root of json file
          },
          /* etc */

json文件“myfile.json”是：

{
"clients" : [
    { "name":"X",
      "age":"34" },
    { "name": "Y",
      "age": "41" },
    /* etc */

我希望“clients”作为MyGet函数中的参数：

public MyGet (json_root: any){
   let results={};
   this.http.get("myfile.json").map(res => res.json()).subscribe(
          output => { 
            results=output.HERE; // HERE = json_root
          },
          /* etc */

所以我可以致电：

MyGet("clients")

我不明白如何在HERE中编写json_root

Answer 1

You can split your function.

  public MyGet (): Observable<any>{
   return  this._http.get("myfile.json").map(res => res.json());
  }
  ....
  private json_root: any;

  public callAndSubscrive(json_key: string){
    this.MyGet().subscribe(output => {this.json_root = output[json_key]; console.log(output)});
  }

Rxjs可观察订阅json，root参数？

1 个答案: