swift-08-tuple decomposition and array

//1. Sometimes it is necessary to split the data in the tuple for example:

var stu = (" Fan Bingbing ", "the female ")

//1) will be Stu assigns three variables to the data in the

var (name,age,gender) = Stu

//2) only partial variables are required , can be used . syntax assignment, or use an underscore to replace the blank position, as follows

var stu1 = (" Zhao Wei ","Max"," male " )

var (Name1,age1,_) = STU1

println (name)

// with Let You can only assign a value once when booting. equals constant

var (name,age,gender) = Stu

//

println (name)

// will be name when assigning other data, the data in the tuple does not change

name = " Li Chen "

2. Arrays

// An array is a data structure that stores data of the same data type in a certain order, using a name and subscript for reference.

//c language. int array[10]; Swift, using let to write several elements of length is a few, can only be assigned one time. Variable length with var guide .

// once the value is assigned length, the contents of the array cannot be changed

Let array:[Int]

Array = [1,2,3,4,5]

ARRAY[2] = 23

Array = [1,2,3,4,5]

// traversal of an array

Print (" first array:")

for (var i:Int =0; i<=4; i++)

{

Print(array[i])

}

println ()

// elements, variable-length arrays

var array1:[Int] = [1,2,3, 4,5]

array1 [0] = 2

Print (" second array:")

for (var i:Int =0; i<=4; i++)

{

Print(array1[i])

}

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swift-08-tuple decomposition and array