var array = ["A","B"]
var array2:[String] = ["A","B"]
var array3:Array
count
isEmpty
insert
removeAtIndex
removeLast
遍历
for index in 0,,array.count
{
}
for item in array
{
}
for (index,item) in enumerate(array)
{
}
字典
Dictionary
[int:String][String:String]
创建
var dict = Dictionary
var courses = [1:"语文",2:"数学"]
courses[1]
删除
courses[1] = nil
count
isEmpty
遍历
for (key,value) in courses
{
}
keys
values