``` val resp = webservicesAPI.fetchLatest() resp?.let { repository.name =...

# getting-started

[Daniele B]

val resp = webservicesAPI.fetchLatest()
        resp?.let {
            repository.name = resp.name   
            repository.lastUpdate = resp.lastUpdate   
        }

[diesieben07]

The let lambda takes a param:

fetchlatest()?.let { resp -> 
    repository.lastUpdate = resp.lastUpdate
    // etc
}

[Daniele B]

@diesieben07 thanks! what about if there are 2 lines in the let block, as I just amended ?

[diesieben07]

You can as many lines in the let block as you want, hence why I put "etc" there 😉

[Daniele B]

ok, I see! thanks!

[marstran]

This might be just stylistic, but I think apply is better here:

webservicesAPI.fetchLatest()
  ?.apply {
      repository.name = name   
      repository.lastUpdate = lastUpdate   
  }

[Daniele B]

@marstran thanks! so is .apply running only if fetchLatest() returns not null ?

[marstran]

Ah, didn't see the ? . You still need that. I fixed the code.

[Daniele B]

ok, I see, thanks!

[diesieben07]

No, apply is like let, except that it uses a lambda wiht receiver instead of a lambda with parameter.

[marstran]

Yes, and it returns the input rather than the return value of the lambda.

[Daniele B]

if (remoteData.lastUpdate == null) {
    fetchWeeklyCasesList()
}

do you also have a suggestion to simplify this code?

[diesieben07]

Not sure what you want to simplify about an if statement 🙂 I would say that code is perfectly fine the way it is.

[Daniele B]

maybe writing ? instead of null ?

[Daniele B]

or maybe it can stay like this 🙂

[marstran]

Yes, I think it should stay. The intention is clearer with the explicit null-check.

[Joost Klitsie]

Also you can think about creating a mapper, This is a great article on the why and mapping from dto's to domain objects is highly recommended, as, in short, it will make your code better testable. In that case your code could be in the likes of:

val repository = webservicesAPI.fetchLatest()?.let { mapper.map(it) }

So I highly recommend reading this:
https://proandroiddev.com/the-real-repository-pattern-in-android-efba8662b754