SwiftzSwift函数式编程
Swiftz 是一个 Swift 库，实现了函数式编程。
示例代码：
let xs = [1, 2, 0, 3, 4]
// we can use the Min semigroup to find the minimal element in xs
sconcat(Min(), 2, xs) // 0
// we can use the Sum monoid to find the sum of xs
mconcat(Sum<Int8, NInt8>(i: { return nint8 }), xs) // 10
// we can delay computations with futures
let x: Future<Int> = Future(exec: gcdExecutionContext, {
sleep(1)
return 4
})
x.result() == x.result() // true, returns in 1 second
// we can map and flatMap over futures
x.map({ $0.description }).result() // "4", returns instantly
x.flatMap({ (x: Int) -> Future<Int> in
return Future(exec: gcdExecutionContext, { sleep(1); return x + 1 })
}).result() // sleeps another second, then returns 5评论