public static IObservable <ImmutableSortedDictionary <TKey, TValue> > ToSortedImmutableDictionaries <TKey, TValue>(this IReactiveDictionary <TKey, TValue> dict)
{
return(dict.Aggregate(
ImmutableSortedDictionary <TKey, TValue> .Empty,
(result, key, value) => result.SetItem(key, value),
(result, key, value) => result.Remove(key)
));
}
public static IObservable <TResult> Aggregate <TKey, TValue, TResult>(
this IReactiveDictionary <TKey, TValue> dict,
TResult seed,
Func <TResult, TValue, TResult> addFunc,
Func <TResult, TValue, TResult> removeFunc)
{
return(dict.Aggregate(seed, (result, _, value) => addFunc(result, value), (result, _, value) => removeFunc(result, value)));
}
public static IObservable <int> Count <TKey, TValue>(this IReactiveDictionary <TKey, TValue> dict)
{
return(dict.Aggregate(0, (total, _) => total + 1, (total, _) => total - 1));
}
