Swift 闭包

代码如下

var numArray:[Int] = [];
for _ in 0 ... 100 {
    numArray.append(random() % 1000)
}

numArray.sort({(a:Int,b:Int) -> Bool in
    return a > b
})

// 简化闭包
let newArray = numArray.sort({a,b in a > b})


let newArray2 = numArray.sort({$0 < $1})