数组 字典

import Foundation

//数组 Swift创建数组一定要制定存放元素类型

et arr1 = [Int]()var arr2 = [String]()

//添加元素

arr2.append("张三")print(arr2)

//修改arr2[0] = "lisi"print(arr2)

//字面量创建数组

var arr3 = ["zhangsan","lisi","wanger","mazi"]print(arr3)

//删除

/根据下标删除

arr3.remove(at: 0)print(arr3)

//删除最后一个元素

arr3.removeLast()  

//arr3.remove(at: 2)

//删除第一个元素

arr3.removeFirst()

//删除所有元素

arr3.removeAll()

//获取数组元素个数

print(arr3.count)print(arr3)

//数组的遍历

var arr4 = ["huaqiangu","shaqianmo","dongfangyuqin","tangbao","zunshang"]for item in arr4{print(item)}

//将下标遍历出来

for (i,Item) in arr4.enumerated(){print("item:\(Item)index:\(i)")}

//数组排序

arr4.sort()print(arr4)//var numArr = [8, 4, 3, 7, 1, 5]

//冒泡排序(双层for循环:外层控制趟数,内层控制每趟比较的次数)

/比较的趟数等于数组个数-1

//比较的次数等于数组个数-比较的趟数

//外层控制趟数for i in 0..升序

//< 降序

if numArr[j] > numArr[j + 1]{

let temp = numArr[j]

numArr[j] = numArr[j + 1]

numArr[j + 1] = temp

}

}

print(numArr)

}

//元素的插入

var arr5 = ["a","b","c","d"]

//下标值<=数组个数

arr5.insert("f", at: 4)

print(arr5)

//字典  创建字典和创建数组是一样创建同时就要制定key和value值的类型

let dict = [String:Int]()  //空字典

let dict2 = ["name":"亚索","age":18,"height":1.8] as [String : Any]

//访问字典的元素

//String?  as!解包

print("国服第一亚索"+(dict2["name"] as! String))

var dic3 = ["name":"蛮子","gender":"妖","skill":"蛮三刀"]

//修改字典

//找得到key值就是改,找不到就是加

dic3["gender"] = "汉子"

dic3["hobby"] = "找妹子"  //增加键值对

//字典的删除

dic3.removeValue(forKey: "gender")

print(dic3)

//字典的遍历

//遍历的是键值对

for value in dic3{

print(value)

}

//遍历字典key值

for key in dic3.keys {

print(key)

}

//遍历字典的value值

for values in dic3.values{

print(values)

}

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