/// <summary>
/// Projects the <paramref name="source"/> signal into a new signal
/// using the <paramref name="selector"/> function and flattens the result into a new signal.
/// </summary>
public static IReadableSignal <TResult> SelectMany <TSource, TResult>(
this IReadableSignal <TSource> source,
Func <TSource, IReadableSignal <TResult> > selector)
{
CheckValue(source, nameof(source));
CheckValue(selector, nameof(selector));
return(source.Select(selector).Flatten());
}
/// <summary>
/// Projects the <paramref name="source"/> signal into a new signal
/// that reacts to all changes but drops the original value.
/// </summary>
public static IReadableSignal <Unit> DropValue <T>(this IReadableSignal <T> source)
{
CheckValue(source, nameof(source));
return(source.Select(value => Unit.Instance));
}