Duckdan的博客

package study.yang.carditemdemo.capturefun String.contact(str: String): String { return this.plus(str)}fun main(){ println("====".contact("哈哈喜欢"))}package study.yang.carditemdemo.capture;import kotlin.Metadata;import kotlin.jvm.interna

一、源代码class Utils private constructor() { companion object { fun getInstance(): Utils { return Instance.instance } } private object Instance { val inst...

一、作用域函数1.1 使用run和let的Apifun runAndLetApi() { var contentString = arrayListOf("112", null, "45", "89") //run没有参数，this代指contentString val let = contentString.run { ...