public static void Map1a()
{
bool notCalled = true;
Func <Either <int, int> > fun = () => { notCalled = false; return(Either <int, int> .OfLeft(1)); };
var q = Either.Map(Enumerable.Repeat(fun, 1), f => f());
Assert.True(notCalled);
q.OnLeft(x => Assert.CalledOnNext(x, ref notCalled));
q.OnRight(x => Assert.Fail());
}
public static Either <IEnumerable <TResult>, TRight> InvokeWith <TSource, TResult, TRight>(
this Func <TSource, Either <TResult, TRight> > @this,
IEnumerable <TSource> seq)
=> Either.Map(seq, @this);