Question

有没有办法让条件限制。

我有一个类，它有一个带有2个参数的事件（控制发送者，字符串文本）。我想在我的Rx代码中使用这个事件，并使用限制。唯一的问题是我想限制文本，只针对同一个发件人。

因此，如果sender = textbox1，则节流300秒，但如果发件人更改，则忽略节流并在链中发送事件。

sender=textbox1, text = 'm' within 300 seconds (ignore)
sender textbox1, text = 'mu' within 300 seconds (ignore)
sender textbox1, text = 'muk' more than 300 seconds (process)

sender=textbox1, text = 'm' within 300 seconds(ignore)
sender=textbox2, text = 'y' within 300 seconds(process) //as the sender has changed now.

Answer 1

以下代码将确保在显示值之前已经过了300ms，除非发件人已更改。

var source = new Subject<Pair>();

// The Publish().RefCount() and Subscribe() are to make the sequence hot
var changedSender = source.DistinctUntilChanged(p => p.Sender).Publish().RefCount();
changedSender.Subscribe();

var throttled = source.Select(p =>
    Observable.Amb(changedSender, source.Skip(TimeSpan.FromMilliseconds(300))).Take(1))
    .Concat();

throttled.Subscribe(WritePair);

source.OnNext(new Pair("A", "i"));
System.Threading.Thread.Sleep(10);
source.OnNext(new Pair("A", "it"));
System.Threading.Thread.Sleep(10);
source.OnNext(new Pair("A", "bit"));
System.Threading.Thread.Sleep(500);
source.OnNext(new Pair("A", "bite"));
source.OnNext(new Pair("B", "a"));
System.Threading.Thread.Sleep(10);
source.OnNext(new Pair("A", "bitey"));
System.Threading.Thread.Sleep(500);
source.OnNext(new Pair("A", "at"));

这会产生以下输出：

A: bite
B: a
A: bitey
A: at

Answer 2

这就是我为完成这项工作所做的工作

        var source = new Subject<Pair>();


        // The Publish().RefCount() and Subscribe() are to make the sequence hot
        //var changedSender = source.DistinctUntilChanged(p => p.Sender).Publish().RefCount();
        var changedSender = source.Zip(source.Skip(1), (previous, next) => new { Previous = previous, Next = next }).DistinctUntilChanged(arg => arg.Next.Sender).Select(o => o.Previous).Publish().RefCount();
        changedSender.Subscribe();
        var either = changedSender.Merge(source.Throttle(TimeSpan.FromMilliseconds(300))); //.Do(o => Console.WriteLine("Do {0}", o.ToString()));
        either.Subscribe(o => o.Print());


        source.OnNext(new Pair("A", "i"));
        System.Threading.Thread.Sleep(10);
        source.OnNext(new Pair("A", "it"));
        System.Threading.Thread.Sleep(10);
        source.OnNext(new Pair("A", "bit"));
        System.Threading.Thread.Sleep(500);
        source.OnNext(new Pair("A", "bite"));
        source.OnNext(new Pair("A", "bite1"));
        source.OnNext(new Pair("A", "bite2"));
        source.OnNext(new Pair("B", "a"));
        source.OnNext(new Pair("B", "ani"));
        source.OnNext(new Pair("B", "animal"));
        System.Threading.Thread.Sleep(10);
        source.OnNext(new Pair("A", "bitey"));
        System.Threading.Thread.Sleep(500);
        source.OnNext(new Pair("A", "at"));
        source.OnNext(new Pair("B", "empty"));
        source.OnNext(new Pair("A", "empty"));
        source.OnNext(new Pair("C", "new"));

        Console.ReadLine();

Reactive.NET条件节流

2 个答案: