F# in Action

9 Building rich domains

This chapter covers

• Working with missing values
• Working with errors
• Computation expressions
• A worked example for modeling domains in F#

In the previous chapter, we more or less finished the language part of the book. There will still be a few new features scattered around, but we’ll start to look at applying those techniques in different scenarios now and looking at F# libraries (both out-of-the-box and third-party) that you should know.

This chapter builds on the previous one, which discussed discriminated unions, by focusing on two specific types that come bundled with F#: Option and Result. These are two key types that are bundled with F# and are very important to learn in order to model domains correctly and effectively. ...