ehsansouri23

val user = User().apply {
  firstName = "ehsan"
  lastName = "souri"
  address = Address()
}

ehsansouri23

val address = findAddress()
address?.let {
  println("$it is a valid address")
} ?: run {
  println("address was null)
}

ehsansouri23

data class User(
  val firstName:String,
  val lastName:String,
  val address:Address
)
// using `with` function
val user = User()
with(user) {
  println(firstName)
  println(lastName)

ehsansouri23

interface DisplayManager {
  
  fun showText(text:String)
}

ehsansouri23

print("this is a sample code in python")