//: 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,11);//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); |
