public override Monad <C> Com <B, C>(Monad <Func <A, B, Monad <C> > > functionMonad, Monad <B> mOther)
{
Monad <C> result = new Nothing <C>();
if (!isNothing && !(mOther is Nothing <B>)) // other is no maybe and this is not nothing.
{
result = null;
foreach (var function in functionMonad)
{
foreach (var otherValue in mOther)
{
if (result == null) // Make result monad the monad type of the function result
{
result = function(aValue, otherValue);
}
else
{
var fResult = function(aValue, otherValue);
if (!(fResult is Nothing <B>))
{
result = result.Concatenate(fResult);
}
}
}
}
if (result == null)
{
result = new Nothing <C>();
}
}
return(result);
}
public override Monad <C> Com <B, C>(Func <A, B, Monad <C> > function, Monad <B> mOther)
{
Monad <C> result = new Nothing <C>(); // New Nothing<B> maybe
if (!isNothing && !(mOther is Nothing <B>))
{
result = null;
foreach (var otherValue in mOther)
{
if (result == null)
{
result = function(aValue, otherValue);
}
else
{
var fResult = function(aValue, otherValue);
if (!(fResult is Nothing <B>))
{
result = result.Concatenate(fResult);
}
}
}
if (result == null)
{
result = new Nothing <C>();
}
}
return(result);
}
public override Monad <B> App <B>(Monad <Func <A, Monad <B> > > functionMonad)
{
Monad <B> result = new Nothing <B>();
if (this is Just <A> && functionMonad != null)
{
result = null;
//result = functionMonad.Return()(aValue).Return();
foreach (var function in functionMonad)
{
if (function != null)
{
if (result == null) // if first time or first time (and second...) was Nothing
{
result = function(aValue);
}
else
{
var fResult = function(aValue);
if (!(fResult is Nothing <B>)) // skip if result is nothing
{
result = result.Concatenate(fResult);
}
}
}
}
if (result == null) // If some function returned null
{
result = new Nothing <B>();
}
}
return(result);
}
public override Monad <C> Com <B, C>(Func <A, B, C> function, Monad <B> mOther)
{
Monad <C> resultMonad = new Nothing <C>(); // New Nothing<B> maybe
if (!isNothing && !(mOther is Nothing <B>))
{
foreach (var otherValue in mOther)
{
resultMonad = new Just <C>(function(aValue, otherValue));
}
}
return(resultMonad);
}
public override Monad <B> Fmap <B>(Func <A, int, B> function)
{
Maybe <B> resMaybe = new Nothing <B>();
if (this is Just <A> && function != null)
{
resMaybe = function(aValue, 0); // implicit operator makes it automatically a Just or a Nothing depending on the function result.
}
if (resMaybe == null)
{
resMaybe = new Nothing <B>();
}
return(resMaybe);
}
public override Monad <B> App <B>(Monad <Func <A, B> > functionMonad)
{
Maybe <B> result = new Nothing <B>();
if (this is Just <A> && functionMonad != null)
{
foreach (var function in functionMonad)
{
if (function != null)
{
result = new Just <B>(functionMonad.Return()(aValue));
}
}
if (result == null)
{
result = new Nothing <B>();
}
}
return(result);
}
public override Monad <C> Com <B, C>(Monad <Func <A, B, C> > functionMonad, Monad <B> mOther)
{
Maybe <C> result = new Nothing <C>();
if (!isNothing && !(mOther is Nothing <B>)) // other no nothing monad.
{
foreach (var function in functionMonad)
{
if (function != null)
{
foreach (var otherValue in mOther)
{
result = function(aValue, otherValue);
}
}
}
if (result == null)
{
result = new Nothing <C>();
}
}
return(result);
}