摘要：
// Playground - noun: a place where people can play swift2.2 NO.1 import UIKit var str = "Hello, playground" // Playground - noun: a place where peopl 阅读全文
摘要：
// Playground - noun: a place where people can play swift2.2 NO.2 import UIKit var str = "Hello, playground" let interestingNumbers=[ "Prime":[2,3,5,7 阅读全文