Generic type 'Array' requires 1 type argument(s). - Angular2

Question

I have been trying to implement a simple ngFor with Angular2 but I don't know what went wrong which lead to error 'Generic TYpe Array requires one argument(s). PLease favour

import { Component } from '@angular/core';


    @Component({
        selector: 'my-app',
        templateUrl:'./app.component.html',                     
    })
    export class AppComponent { 
           clients:Array;
           doctors:Array;
            constructor(){
               this.clients=["Client1", "Client2", "Client3"];
                this.doctors=["Doctor1","Doctor2","Doctor3"];
            }


    }

Read Generics Concept in programming first – soroush gholamzadeh Jul 02 '17 at 14:32 — soroush gholamzadeh, Jul 02 '17 at 14:32

score 39 · Accepted Answer · answered Jul 24 '17 at 14:35

39

solution 1:

clients: String[]; // if type cant be determined use 'any[]'
    doctors: String[];

solution 2:

clients: Array<String>; // if type cant be determined use '<any>'
    doctors: Array<String>;

answered Jul 24 '17 at 14:35

manideep pabba

457
3
5

score 1 · Answer 2 · edited Mar 26 '19 at 10:29

1

I have not used Angular2, but I believe the solution, since you know the type which the array is going to hold, is to use Array<String> instead of array on its own.

NOTE: what you could do is replace String with the angular2 typename for a string primitive.

edited Mar 26 '19 at 10:29

Nico

790
1
8
20

answered Jul 01 '17 at 19:29

flmng0

387
1
2
14

Generic type 'Array' requires 1 type argument(s). - Angular2

2 Answers2