Swift 元祖

 let error501 = (501, "Not implemented")

var TupleName = (Value1, value2,… any number of values)

let error501 = (501, "Not implemented")

print("The code is:\(error501.0)")
print("The definition of error is:\(error501.1)")

 let error404 = (errorCode: 404, description: "Not Found")
 print(error404.errorCode)

let arr = [1, 2, 3]
let dic = ["key1": "value1", "key2": "value2","key3":"value3"]
let anyTuple = (arr,dic)
print("数组元素:\(anyTuple.0[0])")
print("字典元素:\(anyTuple.1["key1"]!) ")