public static TAcc Transduce <TAcc, TIn, TOut>(this IEnumerable <TIn> source, ITransducer <TIn, TOut> transducer, Func <TAcc, TOut, TAcc> reducer, TAcc seed)
{
var sourceEnum = source.GetEnumerator();
var status = new ReductionStatus();
var res = seed;
var red = transducer.Transform(status, reducer);
while (!status.Complete && sourceEnum.MoveNext())
{
res = red(res, sourceEnum.Current);
}
return(res);
}
public static IObservable <TAcc> Transduce <TAcc, TIn, TOut>(this IObservable <TIn> source, ITransducer <TIn, TOut> transducer, Func <TAcc, TOut, TAcc> reducer, TAcc seed)
{
var status = new ReductionStatus();
var res = seed;
var red = transducer.Transform(status, reducer);
return(new AnonymousObservable <TAcc>(observer => source.Subscribe(el => {
if (status.Complete)
{
observer.OnNext(res);
observer.OnCompleted();
return;
}
res = red(res, el);
}, observer.OnError, () => { observer.OnNext(res); observer.OnCompleted(); })));
}
public static IObservable <TOut> Transduce <TIn, TOut>(this IObservable <TIn> source, ITransducer <TIn, TOut> transducer)
{
var status = new ReductionStatus();
var reducer = transducer.Transform <Optional <TOut> >(status, Utils.Enumerator);
return(new AnonymousObservable <TOut>(observer => source.Subscribe(el => {
if (status.Complete)
{
observer.OnCompleted();
return;
}
var res = reducer(new Optional <TOut>(), el);
if (res.HasValue)
{
observer.OnNext(res.Value);
}
}, observer.OnError, observer.OnCompleted)));
}
public static IEnumerable <TOut> Transduce <TIn, TOut>(this IEnumerable <TIn> source, ITransducer <TIn, TOut> transducer)
{
var sourceEnum = source.GetEnumerator();
var status = new ReductionStatus();
var red = transducer.Transform <Optional <TOut> >(status, Utils.Enumerator);
while (sourceEnum.MoveNext())
{
var res = red(new Optional <TOut>(), sourceEnum.Current);
if (status.Complete)
{
break;
}
if (res.HasValue)
{
yield return(res.Value);
}
}
}
public Func <TAcc, TIn, TAcc> Transform <TAcc>(ReductionStatus status, Func <TAcc, TOut, TAcc> reducer)
{
return(_transducer1.Transform(status, _transducer2.Transform(status, reducer)));
}