arifvn

{
  "employees":[
      {
        "name" : {
          "firstName" : "mahera",
          "lastName" : "abdi"
        },
        "isActive" : true,
        "age" : 21,
        "active" : [ "Monday", "Tuesday" ],

arifvn

class Delegate : ReadWriteProperty<Any, String> {
    private var stringResult: String = ""

    override fun getValue(thisRef: Any, property: KProperty<*>): String =
        stringResult

    override fun setValue(thisRef: Any, property: KProperty<*>, value: String) {
        val formatedString = "${property.name}'s value is $value"
        stringResult = formatedString.toLowerCase().capitalize()
    }

arifvn

class Car {
  var name:String by Delegate() 
  var brand:String by Delegate() 
  var origin:String by Delegate() 
}

arifvn

class ViewDelegate(
    private val viewId: Int
): ReadOnlyProperty<AppCompatActivity, String> {
    private var result: String? = null

    override fun getValue(thisRef: AppCompatActivity, property: KProperty<*>): String =
        result ?: thisRef.findViewById(viewId).also { result = it }
}

arifvn

class MainActivity: AppCompatActivity {
  
  val buttonLogin by id(R.id.btn_login)

  // other stuff
  // ..
  // ..
  
  fun AppCompatActivity.id(viewId: Int) = ViewDelegate(viewId)
}

arifvn

class MainActivity : AppCompatActivity() {
    
    private val tvUsername: TextView by lazy { findViewById(R.id.tv_username) }
    private var text: String by Delegates.observable("Initial Value") { property, oldvalue, newValue ->
        tvUsername.text = newValue
    }
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

arifvn

fun nonInline(callback: () -> Unit) {
    println("before callback")
    callback()
    println("after callback")
}

// in java code 
public void nonInline(Function callback) {
    System.out.println("before callback");
    callback.invoke();

arifvn

nonInline {
    println("Noninline function has been called")
}

// in java code | simplified version
nonInline(new Function() {
    @Override
    public void invoke() {
        System.out.println("Noninline function has been called");
    }

arifvn

btnPrintMessage.setOnClickListener {
    nonInline { println("Noninline function has been called") }
}

// in java code | simplified version
btnPrintMessage.setOnClickListener(){
    @override
    void onClick(View v){
        noninline(new Function {
            println("Noninline function has been called") 

arifvn

// declaration
inline fun inlineFunction(callback: () -> Unit) {
    println("before callback")
    callback()
    println("after callback")
}

// calling function
btnPrintMessage.setOnClickListener(){
    inlineFunction(){