集合

var array = [34,234324,53]
array[2]
array.append(6)
array.extend(90...92)


import Foundation
var array1: [AnyObject] = [1,"ds"]


var dictionary = [1: "Dog",2: "cat"]
dictionary[1]
dictionary[3] = "Mouse"
//追加
dictionary
dictionary[2] = nil
//删除

print(dictionary[1]!)
//强制拆包

//数组和字典都是值拷贝