JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

val currentWeatherFlow: Flow<String> =
    dataSource.fetchWeatherFlow()
        .map { ... }
        .filter { ... }
        .dropWhile { ... }
        .combine { ... }
        .flowOn(Dispatchers.IO)

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
   
val currentWeatherFlow: LiveData<String> =
    dataSource.fetchWeatherFlow()
        .map { heavyTransformation(it) }
        .asLiveData()

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
   
val currentWeatherLiveData: LiveData<String> =
    dataSource.fetchWeather().switchMap {
         liveData { emit(heavyTransformation(it)) }
    }

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

val currentWeatherFlow: LiveData<String> = 
    dataSource.fetchWeatherFlow()
        .onStart { emit(LOADING_STRING) }
        .asLiveData()

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
   
// Don't use this
val currentWeatherFlow: LiveData<String> = liveData {
    emit(LOADING_STRING)
    emitSource(
        dataSource.fetchWeatherFlow().asLiveData()
    )
}

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
   
val currentWeather: LiveData<String> = liveData {
    emit(LOADING_STRING)
    emitSource(dataSource.fetchWeather())
}

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

val currentWeatherFlow: LiveData<String> = dataSource.fetchWeatherFlow().asLiveData()

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
   
// Don't use this
val currentWeatherFlow: LiveData<String> = liveData {
    dataSource.fetchWeatherFlow().collect {
        emit(it)
    }
}

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
   
val currentWeather: LiveData<String> = dataSource.fetchWeather()

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
class MyViewModel {
    val result = liveData {
        emit(repository.fetchData())
    }
}