Learn FSHARP with Real Code Examples
Updated Nov 18, 2025
Practical Examples
Domain modeling with DU’s
Financial risk calculator
Async HTTP service
Data pipeline workflow
ML.NET model integration
Troubleshooting
Resolve type inference errors
Fix pipeline mismatches
Handle async workflow debugging
Address .NET interop issues
Resolve FS0082 pattern matching warnings
Testing Guide
Expecto for unit testing
FsCheck for property testing
xUnit or NUnit
Test computation expressions
Mocking via FsToolkit
Deployment Options
Self-contained .NET executables
Docker containers
Azure Functions
Kubernetes
Fable -> Web apps
Tools Ecosystem
F# compiler (FSC)
Ionide
Visual Studio
Fable (JS compiler)
Paket dependency manager
Integrations
.NET libraries
SQL via Dapper/EF Core
ML.NET
Azure cloud stack
Fable + JS ecosystem
Productivity Tips
Use pipelines aggressively |>
Model domains with DU’s
Use REPL for rapid exploration
Use records for clarity
Challenges
Model a full domain using DU’s
Build a financial calculator
Create an async web service
Generate Fable-based SPA