BV.Functional 1.0.10

BV.Functional

This library is ment to provide standard basic constructs for functional programming.

Option<TPayload>

Example usage would be: you have a method returning a value or "nothing" (null). If you forget to handle the "nothing" case in you code, you will get the NullReferenceException (the most thrown exception ever). You can help yourself and pack your result into an Option<TResult>.

        public Option<string> GetSomeStringOption(bool isSet)
        {
            if (isSet)
                return Option.Some("My payload string ");

            return Option.None;
        }

If you try to return null in the method, you will get an exception. You can then consume the method and do something with returned option like here:

        var myOption = GetSomeStringOption(true);

        myOption.Match(
            (payload) => Console.WriteLine(payload), 
            () => Console.WriteLine("Sorry - payload not set"));

The Match-method executes only the payload action if payload is set. If it is not set only the "not set" action will be executed.

There are also some useful extension methods for the Option<TPayload>.

Option extensions

Map

Transform an Option from Option of one Type to Option of another Type:

        Option<TTransformed> Option<TPayload>.Map<TPayload, TTransformed>(Func<TPayload, TTransformed> f)

Bind

Bind extension allows you to bind methods together.

OptionOrErrors<TPayload>

Either<TLeft, TRight>

Post-word

The other functional types are constructed analogical to Option. Explore the library in object browser to get them.