public static IObservable <Unit> Completed <TSource>(this IObservable <TSource> source)
{
return(source.All(x => true).Select(x => Unit.Default));
}
public static void test()
{
ISubject <string> subject = new Subject <string>();
bool b = true;
//Observable.Create创建的observable: 其中它的subscribe已经定义好了,只要一subscribe, 所有结果就会得到
IObservable <string> observable = Observable.Create <string>(
(ob) =>
{
ob.OnNext("1");
ob.OnNext("2");
ob.OnNext("3");
ob.OnCompleted(); //加上这句,对subject调用OnNext不会有任何效果
//return 了一个别的subject的subscribe的结果, 等于是对别的subject进行了一次设置而已
//但是, 如果在里面写了OnCompleted, 则出去之后,这个新建的Observable就会dispose,所以subject也就dispose了
if (b)
{
return(subject.Subscribe(Console.WriteLine, () => Console.WriteLine("subject completed")));
}
else
{
return(subject.Subscribe(str => Console.WriteLine("b == false " + str)));
}
}
);
//IObservable<bool> ob2 = observable.Any();
//ob2.Subscribe(str => Console.WriteLine(str + " ob2"), () => Console.WriteLine("Complted"));
//IObservable<bool> ob3 = observable.MyAny();
//ob3.Subscribe(Console.WriteLine, () => Console.WriteLine("completed"));
//observable.Subscribe((str) => Console.WriteLine(str+ " ob1"), () => Console.WriteLine("completed"));
//subject.OnNext("1");
//b = false;
//observable.Subscribe(Console.WriteLine);
//subject.OnNext("2");
//observable.Subscribe((str) => Console.WriteLine(str + " ob1"), () => Console.WriteLine("completed"));
observable.Dump("observable");
observable.FirstAsync().Dump("firstAsync");
//All返回的也是一个IObservable<bool>, 意思是所有的成员都必须满足这个条件
IObservable <bool> ob4 = observable.All((str) => str.Length == 2);
//ob4.Subscribe(Console.WriteLine);//当subscirbe的时候,回去检查是否每一个元素都满足这个条件
ob4.Dump("ob4");
subject = new Subject <string>();
try
{
subject.FirstAsync().Dump("empty subject first async");
subject.LastAsync().Dump("empty subject last async");
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
subject.OnCompleted();
ISubject <string> subject2 = new Subject <string>();
//虽然SingleAsync是先Dump的,但是其实真正打印的时候,却是subject2.Dump先打印
subject2.SingleAsync().Dump("2 element subject2 single Async");
subject2.Dump("subject2");
subject2.OnNext("1");
//subject2.OnNext("2");
subject2.OnCompleted();
}