为了更加直观,有些号码需要加空格: // 拼接空格,每4位加一个空格 let bankAccount = '6228888888888888888'; let blank_value = bankAccount.replace(/\s/g,'').replace(/(.{4})/g,"$1 ").trim(); console.log(blank_value); 字符串去中间空格: // 字符串去中间空格 let value = 'ab cd efg'; let temp = valu
克隆class Ren{ public $name; public $sex; function __construct($n,$s) { $this->name=$n; $this->sex=$s; } function __clone()//改变克隆的对象内容 { $this->name="李思思";//this代表复本对象 $that->name="李思思";//that代表原本的,后来废弃了 }}$r=new Ren("张丹
安装完visual studio 2017 后添加引用总是提示 未能加载包ReferenceManagerPackage, 这个问题困扰了两天,直到在网上看到了下面这一段 I just got this error after installation of Visual Studio 2017. The solution was as follows. Launch Developer Command Prompt for VS 2017 CD C:\Program Files\Microso
Data binding在Activity中使用: DataBindingUtil.setContentView(this, R.layout.activity_home); Data binding在Fragment中使用: DataBindingUtil.inflate(inflater, R.layout.homepage_fragment, container, false); Data binding在activity中或者fragment加载其他布局怎么办呢?比如 popupwind