ArrayMap 笔记整理
https://blog.csdn.net/OneDeveloper/article/details/89817457
Swift数组遍历
https://www.jianshu.com/p/b6677deee72e
letcountryArray = ["中国","美国","俄罗斯","新加坡","英国"]
/***数组的遍历***/
//1：for in
for index in 0..<4
{
let item = countryArray[index]
print("遍历数组1：\(item)")
}
for item in countryArray
{
print("遍历数组2：\(item)")
}
//2：for in enumerated
for(index, item)incountryArray.enumerated()
{
print("索引：\(index) 元素：\(item)")
}
//3：forEach
countryArray.forEach{ (item)in
print(item)
}
//4：stride to（不包含）
forindexinstride(from:1, to:4, by:1) {
print(index)
}
//5：stride through(包含)
forindexinstride(from:0, through:4, by:2)
{
print(index)
}
