AkshayChordiya

val person = Person().apply {
    name = "Tony Stark"
    age = 52
    // More such stuff
}

AkshayChordiya

FileReader("input.txt").use {
        // Read the file
}
// Automatically closed

AkshayChordiya

try (FileReader reader = new FileReader("input.txt")) {
    // Read the file
} catch (IOException e) {
    e.printStackTrace();
}
// Automatically closed

AkshayChordiya

val person = Person().also {
  it.name = "Tony Stark"
  it.age = 52
  // More such stuff
}

AkshayChordiya

val person = Person().also { p ->
  p.name = "Tony Stark"
  p.age = 52
  // More such stuff
}

AkshayChordiya

val index = "Kotlin".indexOf('K').takeIf { it > 0 } ?: 0

AkshayChordiya

val index = "Kotlin".indexOf('K').takeUnless { it < 0 } ?: 0

AkshayChordiya

val person = with(Person()) {
      name = "Tony Stark"
      age = 52
      // More such stuff
      this
}

AkshayChordiya

class UserViewModel() : ViewModel() {

    /**
     * The user
     */
    private var users: LiveData<List<User>>

    init {
        // Load the user over here
        // users = ....

AkshayChordiya

class MainActivity : LifecycleActivity() {
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // Get the ViewModel instance
        val userViewModel = ViewModelProviders.of(this).get(UserViewModel::class.java)       
        userViewModel.getUsers().observe(this, Observer {
           // Update the UI