kotlin之MutableMap委托

fun main(arg: Array<String>) {

    val map = mutableMapOf("name" to "tom",

            "age" to

    )

    val user = user(map)

    println(user.name)

    println(user.age)

    user.name="cat"

    println(map)

    map.put("age",)

    println(user.age)

}

class user(var map:MutableMap<String,Any>){

  var name:String by map

  var age:Int by map

}

tom

{name=cat, age=}

MutableMap委托变化是双向的,是一种可读写委托