How to join multiple IObservable sequences?

Question

        var a = Observable.Range(0, 10);
        var b = Observable.Range(5, 10);
        var zip = a.Zip(b, (x, y) => x + \"-\" + y);
        zip.Subscribe(Conso         


        

Answer 1

This answer is copied from the Rx forums, just so that it will be archived in here as well:

var xs = Observable.Range(1, 10);
var ys = Observable.Range(5, 10);

var joined = from x in xs
    from y in ys
    where x == y
    select x + "-" + y;

Or without using query expressions:

var joined = 
    xs.SelectMany(x => ys, (x, y) => new {x, y})
    .Where(t => t.x == t.y)
    .Select(t => t.x + "-" + t.y);