StoneKit.Core.Structs.Maybe 2024.1.1.261665

Maybe Monad for C#

Overview

The Maybe monad is a generic struct designed to represent optional values in C# following the Option Monad design pattern. It allows you to work with values that might be absent, helping to write more expressive and concise code.

This library includes extension methods for additional operations and functionalities which makes it unique by keeping the struct size as small as possible.

It has small memory footprints and performs much faster that other available implementations.

For a comprehensive understanding of the Maybe Monad, you can refer to the Pluralsight tech blog and Wikipedia on Monad (functional programming).

Installation

You can install by using NuGet:

PM> Install-Package StoneKit.Core.Strcuts.Maybe

Usage

var maybeWithValue = new Maybe<int>(42);
var maybeEmpty = Maybe<int>.Empty;
var toMaybe = 10.ToMaybe();

var maybe = Maybe<int>.Empty
    .Or(10)
    .Where(x => x > 5)
    .Perform(x=> Console.WriteLine($"{x} is greater than 5."))
    .Match(
        value => value < 50,
        value => Console.WriteLine($"{value} is smaller than 50.")
    )
    .Where(x=> x >100)
    .PerformOnEmpty(() => Console.WriteLine("Performing action on empty Maybe"))
    .Or(100)
    .Finally(x=> Console.WriteLine("I'm done!"));

Extensions

Perform

Performs an action on the value if the Maybe monad has a value.

PerformOnEmpty

Performs an action when the Maybe monad is empty.

Finally

Performs an action on the value regardless of whether the Maybe monad has a value.

Or

Returns the original Maybe monad if it has a value; otherwise, returns a new Maybe monad with the specified default value.

Map

Maps the Maybe monad from one type to another using a provided function.

MapOnEmpty

Maps the Maybe monad to another type when it is empty, using a provided function.

SelectMany

Selects and projects the value of the Maybe monad using provided functions.

Where

Filters the Maybe monad based on a predicate.

ToMaybe

Converts an object to a Maybe monad.

ToType

Converts an object to a Maybe monad of a specific type.

Contributing

If you find any issues or have suggestions for improvements, feel free to open an issue or create a pull request.

License

This Maybe Monad library is licensed under the MIT License.