How to create object from static method which accepts function

Question

 static fromDto(httpClient: HttpClient, adalSvc: MsAdalAngular6Service) {
        return (dto: Dto) => {
          return new Note(httpClient, dto.xxx, adalSvc);

        };
   }

How to get the Note object from this static method in typescript. I have create a Dto object and trying to pass it to this method which will give me a Note object but can't seem to do that.

What I did was this

const notes = dtos.map(d => {
Note.fromDto(null, null).apply(d); });

can you please tell me how to do that?

Kurt Hamilton · Accepted Answer · 2020-03-09 13:53:42Z

1

Your fromDto returns a function whose signature matches what the map array function callback. At the moment your map callback is returning nothing, so will produce an array of undefined values.

You can use the long version and return from the callback:

const notes = dtos.map(d => {
  return Note.fromDto(null, null)(d); 
});

Or the slightly shorter version with a single-line body:

const notes = dtos.map(d => Note.fromDto(null, null)(d));

Or you can pass the function in as the callback:

const notes = dtos.map(Note.fromDto(null, null));

DEMO: https://stackblitz.com/edit/angular-nsdpcr

answered Mar 9, 2020 at 13:53

Kurt Hamilton

13.7k1 gold badge28 silver badges42 bronze badges

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

Collectives™ on Stack Overflow

How to create object from static method which accepts function

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