值类型和引用类型

发布时间：2020-12-14 02:18:28 所属栏目：百科来源：网络整理

导读：值类型和引用类型 import UIKit func tryToChangeValue( var x:Int ){x++} var a:Int = 2 tyrChangeValue(a) a var b:Int = a b b++ b a Value Type and Reference Type Int,Float,Double,Bool Tuple - Value Type String,Array,Dictionary Function,Closure

值类型和引用类型
import UIKit

func tryToChangeValue( var x:Int ){x++}
var a:Int = 2
tyrChangeValue(a)
a

var b:Int = a
b
b++
b
a

Value Type and Reference Type
Int,Float,Double,Bool

Tuple
-> Value Type
String,Array,Dictionary

Function,Closure -> Reference Type

import UIKit

func calcTotalMiles( todayMiles:Int ) -> ( ) -> Int{
var totalMiles = 0
return {totalMiles += todayMiles; return totalMiles;}
}

var dailyTwoMiles = calcTotalMiles(2)
dailyTwoMiles()
dailyTwoMiles()
dailyTwoMiles()

var dailyThreeMiles = calcTotalMiles(3)
dailyThreeMiles( )
dailyThreeMiles( )
dailyThreeMiles( )

var myPlan = dailyTwoMiles
maPlan()

dailyTwoMiles( )

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!