Johnson的专栏

参考这个:http://www.cocoachina.com/swift/20150619/12173.html1.map用于将数组中的每一项统一的进行改变2.filter用于对数组进行过滤3.sort用于对数组进行排序4.reduce用于对数组的每一项进行总的统计简化的不能再简化了.

//队列 同步 异步 锁 延时 依赖 func thread_queue(){ //创建串行队列 let serial_queue = dispatch_queue_create("label",DISPATCH_QUEUE_SERIAL) //创建并发队列 let con_queue =

//: Playground - noun: a place where people can playclass YOU{}class MyClass { var arr:Array = ["1","2"] //延迟实例化 lazy var obj = YOU() var prop:String = "hello" func mymethod(){

OSX 10.10.5 (14F27)XCODE Version 7.1.1 (7B1005)swift -version --->Apple Swift version 2.1 (swiftlang-700.1.101.6 clang-700.1.76)AppDelegate.swift://// AppDelegate.swift// 3DTouchDemo/