Scheduling a IEnumerable periodically with .NET reactive extensions

Question

Say for example I have an enumerable

dim e = Enumerable.Range(0, 1024)

I\'d like to be able to do

dim o = e.ToObservable(Timesp         


        

Answer 1

You'd need something to schedule notifying observers with each value taken from the Enumerable. You can use the recursive Schedule overload on an Rx scheduler.

Public Shared Function Schedule ( _
    scheduler As IScheduler, _
    dueTime As TimeSpan, _
    action As Action(Of Action(Of TimeSpan)) _
) As IDisposable

On each scheduled invocation, simply call enumerator.MoveNext(), and call OnNext(enumerator.Current), and finally OnCompleted when MoveNext() returns false. This is pretty much the bare-bones way of doing it.

An alternative was to express your requirement is to restate it as "for a sequence, have a minimum interval between each value".

See this answer. The test case resembles your original question.