Swift-元组tuple

//
//  main.swift
//  tuple元组Demo
//
//  Created by 程磊 on 15/5/20.
//  copyright (c) 2015年 chenglei. All rights reserved.
//

import Foundation

//元组的使用

//元组创建的第1种方式
let (x,y) = (1,2); //定义一个简单的元组
println("x is \(x) and y is \(y)");

//元组创建的第2种方式
let http404Error = (404,"Not Found");
println("http404Error = \(http404Error)");

//访问元组的值1
let (statusCode,statusMessage) = http404Error;//采用类似Dictionary的方式通过key来查询value
println("statusCode = \(statusCode) and statusMessage = \(statusMessage)");
//访问元组的值2
let (justTheStatusCode,_) = http404Error;//如果仅需要获取元组中个别的值，可是使用"_"的方式来忽略不需要的值
println("justTheStatusCode = \(justTheStatusCode)");
//访问元组的值3
println("statusCode = \(http404Error.0) and statusMessage = " + String(http404Error.1));//使用序号来访问

//元组创建的第3种方法
let http200Status = (statusCode: 200,desc:"OK");
println("statusCode = \(http200Status.statusCode) and Desc is \(http200Status.desc)");