public static IObservable <int> Count <T>(this IReactiveSet <T> set)
{
if (set == null)
{
throw new ArgumentNullException(nameof(set));
}
return(set.Aggregate(0, (x, _) => x + 1, (x, _) => x - 1));
}
public static IObservable <int> Product(this IReactiveSet <int> set)
{
if (set == null)
{
throw new ArgumentNullException(nameof(set));
}
return(set.Aggregate(1, (x, y) => x * y, (x, y) => x / y));
}
private static IObservable <IImmutableSet <T> > ToImmutableSets <T>(this IReactiveSet <T> set, Func <IImmutableSet <T> > setFactory)
{
if (set == null)
{
throw new ArgumentNullException(nameof(set));
}
if (setFactory == null)
{
throw new ArgumentNullException(nameof(setFactory));
}
return(set.Aggregate(ImmutableHashSet <T> .Empty, (x, y) => x.Add(y), (x, y) => x.Remove(y)));
}
public static IObservable <ImmutableSortedSet <T> > ToImmutableSortedSets <T>(this IReactiveSet <T> set)
{
return(set.Aggregate(ImmutableSortedSet <T> .Empty, (x, y) => x.Add(y), (x, y) => x.Remove(y)));
}