Due to a TypeScript error stating that the type '{ Id: number; Name: string; }' cannot be utilized as an index type, I am unable to assign a value for students at this time

I am facing an issue with defining a value for students in TypeScript. It is giving me an error saying that it can't be used as index type. Just to clarify, I have declared id as number (not Number) and Name as string (not String).

import { Component } from '@angular/core';
interface student {
  Id: number;
  Name: string;
}
@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent {
  students: Array<student> = [];
  color: string = 'color: red';
  color2: string = 'color : blue';
  userName: string = '';
  title = 'ng-project';
  constructor() {
    this.students[{ Id: 0, Name: 'John' }];
  }
}

Answer №1

Give this a shot:

import { Component } from '@angular/core';
interface person {
  Id: number;
  Name: string;
}
@Component({
  selector: 'unique-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent {
  people: Array<person> = [];
  theme: string = 'background-color: green';
  style: string = 'font-weight: bold';
  userAlias: string = '';
  heading = 'ng-unique';
  constructor(enter code here) {
    this.people[{ "Id": 0, "Name": 'unique' }];
  }
}

Answer №2

It appears that you are attempting to add an element to an array within a constructor. Here is the corrected code:

import { Component } from '@angular/core';
interface student {
  Id: number;
  Name: string;
}
@Component({
  selector: 'sameh-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent {
  students: Array<student> = [];
  color: string = 'color: red';
  color2: string = 'color : blue';
  userName: string = '';
  title = 'ng-arab';
  constructor() {
    this.students.push({ Id: 0, Name: 'sameh' }); // <- correction made here
  }
}

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