TypeScript typed array declaration error

Question

For a given class I am declaring a few private variables in the constructor, and making some calls. I can getting a No Provider error on my typed array declaration when including it in the constructor, and no errors when declaring it outside the constructor.

This code works, error free

  private data: Array<MyType>;

  constructor(private service: Service) {
    this.service.getData().then(response => this.data = response.json());
  }

Then, paradoxically, the below does not work, and produces the error found below the snippet.

  constructor(private data: Array<MyType>, private service: Service) {
    this.service.getData().then(response => this.data = response.json());
  }

Error from console is

EXCEPTION: Error: Uncaught (in promise) ORIGINAL EXCEPTION: No provider for Array!

Is this some syntax error? Am I horribly misunderstanding a concept? Both implementations appear identical and feel like they should behave exactly the same.

I assume this is Angular?

user663031
– user663031

2016-08-04 16:04:42 +00:00
Commented Aug 4, 2016 at 16:04 — user663031
– user663031, Commented Aug 4, 2016 at 16:04

Paleo · Accepted Answer · 2016-08-04 15:26:40Z

1

The code is equivalent... except for the call to the constructor. ;)

In the first case:

new TheClass(service);

In the second case:

new TheClass(somethingHere, service);

answered Aug 4, 2016 at 15:26

Paleo

24k5 gold badges74 silver badges84 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

TypeScript typed array declaration error

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related