//用if let与guard let实现同一效果,会发现guard降低一个分支 //可以用if var guard var 表示定义的变量能修改值 func test(){ let name:String? = "张三" if let a = name { print(a) }else{ print("李四") } guard let c = name else { print("李四") return } print("c=\(c)…
[无聊的事-连载之连开100个VS] 折腾你的骚机吧,骚年们!!! 只有8G内存的,用这个:打开你的CMD命令提示符如果只装了Visual Studio 2010,用这条命令,打开50个VSfor /l %i in (1,1,50) do "C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\devenv.exe" 如果装了Visual Studio 2012,用这条命令for /l %i in (1,1,50…
The Prince George's County Fire Department said the guard was taken to hospital in a critical condition. The FBI said the shooting was related to another incident in Washington DC. The agency did not provide further details on the two incidents, but…