dotMaybe 0.0.1

dotMaybe - The Maybe Monad for .NET

dotMaybe is a lightweight, intuitive implementation of the Maybe monad for .NET. It simplifies working with optional values, eliminating null reference exceptions and promoting a more functional, declarative programming style.

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How to use

Creation

Maybe<string> someMaybe = Some.With("Hello, World!");
Maybe<string> noneMaybe = None.OfType<string>();

Retrieving value

int someValue = someMaybe.Match(none: () => -1, some: v => v.Length); // 13
int noneValue = noneMaybe.Match(none: () => -1, some: v => v.Length); // -1

Chaining operations

someMaybe
    .Map(v => v.Length) // Maybe<int> of 13
    .Bind(v => v > 20 ? Some.With(v) : None.OfType<int>()); // Maybe<int> of None

noneMaybe
    .Map(v => v.Length) // Maybe<int> of None
    .Bind(v => v > 20 ? Some.With(v) : None.OfType<int>()); // Maybe<int> of None

Query syntax

// Execute function if all maybes contain value
Maybe<int> finalSomeMaybe =
    from v1 in someMaybe
    from v2 in Some.With("Hello, World!")
    from v3 in Some.With("Hello, World!")
    let v4 = "Hello, World!"
    select v1.Length + v2.Length + v3.Length + v4.Length; // Maybe<int> of 52

// Returns None when any Maybe don't contain value
Result<int> finalNoneMaybe =
    from v1 in noneMaybe
    from v2 in Some.With("Hello, World!")
    from v3 in None.OfType<string>()
    let v4 = "Hello, World!"
    select v1.Length + v2.Length + v3.Length + v4.Length; // Maybe<int> of none

Contribution

If you would like to contribute to this project, check out CONTRIBUTING file.

License

This project is licensed under the terms of the MIT license.