Question

我有一个接口类和JSON文件，我想将其转换为列表并对其进行处理。例如，将JSON中每个对象的Racename放入list \ array。可能吗？这就是界面：

interface IRunners{
Racename: string;
Category:number; 
Gender:string; 
Work:string; 
FullName:string; 
Rank:number;
Point:number;
Numparticipant:number;
rankparticipant:number;
precentagePart:string; 
NumRaces:number; 
RaceTime:string; 
rankCat:number; 
PointCat:number; 
RaceDate:string;
}

这是JSON文件（Runners.json）：

[
  {"Racename":"A1","Category":34,"Gender":"זכר","Work":"AMDOCS","FullName":"Simon Work ","Rank":1,"Ponit":1,"Numparticipant":0,"rankparticipant":0,"precentagePart":"0","NumRaces":1,"RaceTime":"2018-10-18T00:34:20","rankCat":1,"PointCat":1,"RaceDate":"2018-10-05"}
]

我正在按以下方式订阅：

  this.runnerService.getRunners().subscribe(
        runners=>{
          this.runners = runners;
          this.filteredCompetitions = this.runners;
          this.filteredRunners = this.runners;
        }

我想将runners JSON转换为数组，以便进行一些更改并从中获取一些数据。我是Typescript和Angular的新手，所以我可能会犯一些错误。

Answer 1

您可以使用Array#map()。

// Assumes runners.json is a file in the same directory as this file
const jsonArray = require("./runners.json")

// // returns ["A1"]
const listOfRacenames = jsonArray.map(d => d.Racename)

将JSON接口转换为数组

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