Getting started
- Installing and using F# will get you started.
- Why use F#?. An interactive tour of F#.
- Learning F# has tips to help you learn more effectively.
- Troubleshooting F# for when you have problems getting your code to compile.
Tutorials
The following series are tutorials on the key concepts of F#.
- Thinking functionally starts from basics and explains how and why functions work the way they do.
- Expressions and syntax covers the common expressions such as pattern matching, and has a post on indentation.
- Understanding F# types explains how to define and use the various types, including tuples, records, unions, and options.
- Designing with types explains how to use types as part of the design process, making illegal states unrepresentable.
- Understanding computation expressions demystifies them and shows how you can create your own.
Popular topics
General:
- Four key concepts that differentiate F# from a standard imperative language.
- Understanding F# indentation.
- The downsides of using methods.
Functions:
Control Flow:
- Match..with expressions and creating folds to hide the matching.
- If-then-else and loops.
- Exceptions.
Types:
- Option Types especially on why None is not the same as null.
- Record Types.
- Tuple Types.
- Discriminated Unions.
Worked examples:
- Designing for correctness: How to make illegal states unrepresentable (a shopping cart example).
- Stack based calculator: Using a simple stack to demonstrate the power of combinators.
- Parsing commmand lines: Using pattern matching in conjunction with custom types.
- Roman numerals: Another pattern matching example.
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