03 2016 档案
摘要:System.Net.Dns.GetHostEntry(Request.ServerVariables["remote_addr"]).HostName;
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摘要:var optionalString: String? = "facial"; var greeting = "hi"; if let name = optionalString { //把optionalString复制给一个临时变量 name. 可以判断optionalString是否有值, g
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摘要:There’s an even simpler way to include values in strings: Write the value in parentheses, and write a backslash (\) before the parentheses. This is kn
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