var str = "Hello, playground"
//1.定义方式
vararray1: [String] = [String]()//Array
vararray2: [String] =Array()
//2.定义方法2
vararray3:Array = [String]()
var array4: Array<String> = Array<String>()
//let /var
let array5:[Int] = [1,2,3,4,5,6];//[String] = [String]();
//操作
print(array5.count)
print(array1.isEmpty)
array3.append("A")
array3.append("B")
array3.append("C")
array3.insert("D", at:2)
array3.removeLast()
array3.first
array3[0] = "AA"
array3.reverse()
print(array3)
//遍历
foriin0..
{
print(array5[i])
}
foriteminarray5
{
print(item)
}
foriteminarray5[2...4]
{
print(item)
}
for(index, item)inarray5.enumerated()
{
print("\(index)---\(item)")
}
//合并
letarray6:[String] = ["1","2","3"];
letarray7:[String] = ["A","B","C"];
letarray8:[String] = ["4","5","6"];
let array9 = array6 + array7 + array8
print(array9)
//不建议这样做
vararray10:[Any] = [2,3.0,"zhaoyinshuang"]
vararray11:[Any] = ["lisi",true]
vararray12 =array10+array11
print(array12)
