CallMeMaybe 0.7.1

Provides a class and a few extension methods to facilitate common operations with values that may or may not exist.

Traditionally, programmers often use `null` references to represent values that "aren't there", but the problem is that this was never their intended purpose.

- Languages like C# don't provide a way to differentiate between reference variables that can be null and those that are guaranteed not to be.
- The inventor of null references has [apologized]( for creating them in the first place, calling them his "billion-dollar mistake."
- This misuse of null references has spread far and wide, leading to the unfortunately-named `Nullable<>` type (which, being a value type, is never actually null), and attributes like `[CanBeNull]` and `[NotNull]` to help programmers know when they can expect a method to treat a null value as legitimate input.

All this leaves us in a position where our best hope of avoiding `NullReferenceException`s lies in trying to make sure that our reference variables are *never* null. But in that case, how do we indicate when a value is *optional*?

Well, that's where `Maybe<>` comes in.

Install-Package CallMeMaybe -Version 0.7.1
dotnet add package CallMeMaybe --version 0.7.1
<PackageReference Include="CallMeMaybe" Version="0.7.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add CallMeMaybe --version 0.7.1
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: CallMeMaybe, 0.7.1"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install CallMeMaybe as a Cake Addin
#addin nuget:?package=CallMeMaybe&version=0.7.1

// Install CallMeMaybe as a Cake Tool
#tool nuget:?package=CallMeMaybe&version=0.7.1
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

v0.7.1 - Added copyright and other project information to assembly.
v0.7.0 - `Do()` returns the source `Maybe` to allow chaining. Added `ElseDo()`.
v0.6.8 - Bug fixes
v0.6.7 - CallMeMaybe is ClsCompliant again.
v0.6.6 - Added `SelectMany` overload.
v0.6.2 - CallMeMaybe is now ClsCompliant
v0.6.1 - Included XML documentation
v0.6 Beta.
- Added parsers, with a couple of basic parsing extension methods.
- Added OfType<>().
- Added FirstMaybe() and SingleMaybe() extension methods.
- Added a lot of XML documentation comments.
v 0.5 Alpha. **Breaking Change**: object.Equals() override behaves differently now. Prefer `==` or `Is()` instead.
v 0.4 Alpha. Added "Is()" method, and "Values()" extension method, plus lots of comments.
v 0.3.5318 Alpha. Added better conversion to/from Nullables. Maybe IMaybe interface public. Added LINQPad sample.
v 0.3 Alpha release. Added Do() methods and an Else() overload that takes a function parameter. More correct handling of null arguments. And documentation on most of the types and methods!
v 0.2 Alpha release. API subject to change (but probably not as much as it did last time).
v 0.1 Alpha release. API subject to change.


This package has no dependencies.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on CallMeMaybe:

Package Downloads
Some usage samples to help you get the hang of the Maybe<> type and associated extension methods which are available in the CallMeMaybe library.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version History

Version Downloads Last updated
0.7.1 4,664 12/31/2018
0.7.0 3,895 5/14/2018
0.6.8 1,821 10/11/2017
0.6.7 567 10/10/2017
0.6.6 656 8/31/2017
0.6.2 2,079 5/11/2016
0.6.1 1,223 5/3/2015
0.6.0 777 5/2/2015
0.5.0 1,492 2/7/2015
0.4.0 918 12/29/2014
0.3.5318 922 7/25/2014
0.3.5303 798 7/9/2014
0.3.5252 931 5/20/2014
0.2.5199 966 3/28/2014
0.1.5178 827 3/7/2014