F# Example Codebase

This is some code from converting an interview coding test from C# into F#. It makes use of the awesome FsToolkit.ErrorHandling package (https://github.com/demystifyfp/FsToolkit.ErrorHandling).

This codebase contains a number of F# features and techniques including:

• Computation Expressions
• Higher-Order Functions
• Validation
• Discriminated Unions
• Single-case Discriminated Unions
• Result and Option
• Records and Tuples
• Modules

Free F# ebook

To learn more about these features and a lot more, you can download my free 200-page ebook from https://leanpub.com/essential-fsharp

Setting up

This code was written using VS Code, the ionide F# extension, and .Net SDK 7.0.10.

Running the code

In the terminal, navigate to the project in the src folder and type:

dotnet run

In the terminal, you will get an output of Ok ()

If you change some of the data to be invalid, say the FirstName to " " and the Email to "" and run again you will get an output of Error (FailedCreateValidation [EmptyFirstName " "; InvalidEmail ""])

Running the tests

Open a new terminal, navigate to the project in the tests folder and type:

dotnet test

In the terminal, you will get an output showing the result of running the tests.