swift closure

//: Playground - noun: a place where people can play //闭包closure，类似c语言的函数指针或oc的blocks//闭包可以让代码显得非常简洁 importCocoa ////////////////////////////函数定义 funciscontain(arr:[Int],value:Int,cb:(num:Int)->Bool) ->Bool{ foriinarr{ if(cb(num:i,small:value)){ returntrue; } } returnfalse; } ////////////////////////////传统 funclessthan(value:returnvalue<less; } varvarr = [20,40,216)">67,216)">10,216)">44,216)">22,216)">99,216)">60]; varb =iscontain(varr,11ssthan);//调用 printlnb); str ="Hello,playground" ////////////////////////////closure varb1 =iscontain(varr,216)">98, {(num:Boolinreturnnum>small;} );//闭包调用 varb2 = iscontain98return$0>$1;});//另一种调用方法//$0表示第一个参数，$1表示第二个参数 ///////////////////////特`别`的/////////////////////////// //: Playground - noun: a place where people can play import Cocoa //字符串排序，有简到繁 let names=["zxh","xiaoming","lily","anna","daty","1jack"]; var sortedname = names.sorted({$0<$1}); sortedname; var sorted1 = names.sorted({s1,s2 in s1<s2}); sorted1; var sorted2 = names.sorted({(s1:String,s2:String)->Bool in return s1<s2}); sorted2; func compareName(s1:String,s2:String)->Bool{ return s1<s2; } var sorted3 = names.sorted(compareName);