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About Property Delegate

property delegate enable you get or set a property value

by DelegateObject.getValue or DelegateObject.setValue

in this way, Delegate object can be reused in similar places

Sources

fun main() {val hello = Hello()hello.name = "tom"println(hello.name)
}class Hello {var name: String by Delegate()
}class Delegate {private var value = ""operator fun getValue(thisRef: Any, property: KProperty<*>): String {return "${thisRef.javaClass.simpleName}::${property.name}=${value}"}operator fun setValue(thisRef: Any, property: KProperty<*>, value: String) {this.value = value}
}