A001.02-2014.06-WWDC2014Session402-Part BeyondtheRetrievingaValuefromaletnumberOfLegs螞蟻6小蛇0小狗4]possibleLegCount=numberOfLegs["章魚"]letnumberOfLegs螞蟻6小蛇0小狗4]possibleLegCount:Int?=numberOfLegs["章魚"]QueryinganletnumberOfLegs螞蟻6小蛇0小狗4]possibleLegCount:Int?=numberOfLegs["章魚"]ifpossibleLegCount==nil}QueryinganletnumberOfLegs螞蟻6小蛇0小狗4]possibleLegCount:Int?=numberOfLegs["章魚"]ifpossibleLegCount==nil}elseletlegCountpossibleLegCount!}QueryinganletnumberOfLegs螞蟻6小蛇0小狗4]possibleLegCount:Int?=numberOfLegs["章魚"]ifpossibleLegCount==nil}elseletlegCountIntpossibleLegCount!}QueryinganifpossibleLegCountletlegCount=} anifletlegCountpossibleLegCount{} anifletlegCountpossibleLegCount{}IfIfiflegCount==0{}else}IfIfif(legCount0{}else}IfIfiflegCount==0{}else}IfIfiflegCount==0{}else}MoreComplexIfiflegCount==0{elseiflegCount1{}else}SwitchswitchlegCount{case0:case}Switchswitchsender{casebutton:caseusernameTextField:}SwitchswitchlegCount{case0:case1,3,5,7,9,11,case2,4,6,8,10,12,}SwitchswitchlegCount{case0:case1,3,5,7,9,11,case2,4,6,8,10,12,}errorswitchmustbeexhaustiveSwitchswitchlegCount{case0:case1,3,5,7,9,11,}SwitchswitchlegCount{case0:case1,3,5,7,9,11,}MatchingValueswitchlegCount{case0: case}MatchingValueswitchlegCount{case0: case}MatchingValueswitchlegCount{case0: case}IntermediateSwift|Swift進 MatchingValueswitchlegCount{case0: case}funcsay o(){}funcsay o(){} funcsay o(){} Functionswithfuncsay o(nameStringprintln("\(name)你好!")}Functionswithfuncsay o(nameStringprintln("\(name)你好!")} Functionswithfuncsay o(nameStringprintln("\(name)你好!")} 你好你好DefaultParameterfuncsay o(nameString路人甲"println("\(name)你好!")}DefaultParameterfuncsay o(nameString路人甲"println("\(name)你好!")} DefaultParameterfuncsay o(nameString路人甲"println("\(name)你好!")} 路人甲你好路人甲你好DefaultParameterfuncsay o(nameString路人甲"println("\(name)你好!")} o(name: 路人甲你好路人甲你好DefaultParameterfuncsay o(nameString路人甲"println("\(name)你好!")} o(name: 你好ReturningfuncbuildGreeting(nameString路人甲String{returnname+"你好!"}ReturningfuncbuildGreeting(nameString路人甲Stringreturnname+"你好!"}letgreeting=ReturningfuncbuildGreeting(nameString路人甲Stringreturnname+"你好!"}letgreeting:String=ReturningfuncbuildGreeting(nameString路人甲Stringreturnname+"你好!"}letgreeting=buildGreeting()ReturningfuncbuildGreeting(nameString路人甲Stringreturnname+"你好!"}letgreeting=buildGreeting()ReturningMultiplefunc ge()->(Int,String)嘗試刷新return(200,}ReturningMultiplefunc ge()->(Int,String)嘗試刷新return(200,}(3.79,3.99,(404,"Not(2,"banana",(3.79,3.99,(404,"Not

//(Double,Double,//(Int,(2,"banana", //(Int,String,ReturningMultiplefunc ge()->(Int,String)嘗試刷新return(200,}posingafunc ge()->(Int,String)嘗試刷新return(200,}let(statusCode,message)= posingafunc ge()->(Int,String)嘗試刷新return(200,}let(statusCode,message)=refreshW println("Received\(statusCode):\(message)")posingafunc ge()->(Int,String)嘗試刷新return(200,}let(statusCode,message)=refreshW println("Received\(statusCode):\(message)")ReceivedReceived200:posingafunc ge()->(Int,String)嘗試刷新return(200,}let(statusCode:Int,message:String)=refreshW println("Received\(statusCode):\(message)")ReceivedReceived200: positionforletnumberOfLegs螞蟻6小蛇0小狗4]for(animalName,legCount)innumberOfLegs{}NamedValuesinafunc ge()->(code:Int,message:String)嘗試刷新return(200,}NamedValuesinafunc ge()->(code:Int,message:String)嘗試刷新return(200,}letstatus= println("Received\(status.code):NamedValuesinafunc ge()->(code:Int,message:String)嘗試刷新return(200,}letstatus= println("Received\(status.code):ReceivedReceived200:letgreetingPrinter={ oWorld!")}letgreetingPrinter:()->()={ oWorld!")}letgreetingPrinter:()->()={ oWorld!")}funcgreetingPrinter()->()={ oWorld!")}letgreetingPrinter:()->()={ oWorld!")}funcgreetingPrinter()->()={ oWorld!")}letgreetingPrinter:()->()={ oWorld!")}letgreetingPrinter:()->()={ oWorld!")}ooClosuresasfuncrepeat(count:Int,task:()->()){foriin0..count{}}Closuresasfuncrepea