How to add static data to a typescript model class-CodePudding

I have a requirement to create a model class in typescript, this is my data.

A-E
  Automative
  Chemicals
  Energy

F-O
 Forest Product
 Industrial
 Mining

P-Z
 Retail
 Software Platform
 Unilites

For this data, I have created below model class

export class Industries 
{
  alphaIndex: string = '';
  industries: Array<string> = [];

  constructor(alphaIndex: string, industries: []) {
    this.alphaIndex = alphaIndex;
    this.industries = industries; 
  }
}

When I want to add data in it, getting error

let record = new Industries ({alphaIndex: 'A-E', industries: ['Automative','Chemicals']});
this.industries.push(record);

Getting below below error

Expected 2 arguments, but got 1.ts(2554) home.component.ts(28, 35): An argument for 'industries' was not provided

This is correct model for provided data ? How can I add data to my model ?

CodePudding user response：

You are passing in an object into the constructor

Instead you should pass as separate variables

let record = new Industries ('A-E',['Automative','Chemicals']);
this.industries.push(record);

if you wanted to have it as an object type param then you would need to do this


export interface IIndustryParam {
   alphaIndex : string;
   industries: Array<string>;
}

export class Industries 
{
  alphaIndex: string = '';
  industries: Array<string> = [];

  constructor(industryParam : IIndustryParam) {
    this.alphaIndex = industryParam.alphaIndex;
    this.industries = industryParam.industries; 
  }
}

let record = new Industries ({alphaIndex: 'A-E', industries: ['Automative','Chemicals']});
this.industries.push(record);