ch8n

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    ...
    val binding = MainLayoutBinding.inflate(layoutInflater)
    setup(binding)
}
// write binding once and forget ✅
fun setup(binding:MainLayoutBinding) = with(binding) {
    textName.text = "ch8n"

ch8n

val binding = MainLayoutBinding.inflate(layoutInflater)
with(binding) {
    textName.text = "ch8n"
    textTwitter.text = "twitter@ch8n2"
})

ch8n

val userName: String
    get() = preferenceManager.getInstance()?.getName() ?: getString(R.string.stranger)

ch8n

val userName: String
    get() {
        preferenceManager.getInstance()?.run { 
            getName() 
        } ?: run {
            getString(R.string.stranger)
        }
    }
    

ch8n

val intent = Intent(context, MyActivity::class.java).apply {
    // scope to configure object
    putExtra("data", 123)
    addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT)
})
startActivity(this@FooActivity,intent)

ch8n

Intent(context, MyActivity::class.java).apply {
    // scope to configure object
    putExtra("data", 123)
    addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT)
}).also { intent ->
    // scope to consume the object
    startActivity(this@FooActivity,intent)
}

ch8n

class Foo {
  var imageFile : File ? = ...
  fun deleteImage(){
      // 🧐 you can get away for now
      imageFile?.let { image ->
        if(image.exists()) image.delete()
      }
  }
}

ch8n

class Foo {
  var imageFile : File ? = ...
  fun deleteImage(){
     val imageFile = this.imageFile
     if(imageFile != null) {
        if(imageFile.exists()) imageFile.delete()
     }
  }
}

ch8n

fun deleteImage(){
   val imageFile : File ? = ...
   if(imageFile != null) {
      // 👇 smart casted imageFile into non nullable
      if(imageFile.exists()) imageFile.delete()
   }
}

ch8n

fun deleteImage(){
   var imageFile : File ? = ...
   imageFile?.let { // ❌ don't write code like this
      if(it.exists()) it.delete()
   }
}