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Jindřich Ivánek

F# developer

Jan 11, 2024

F# tips weekly #1: Single case DU

Single-case discriminated unions are a great way to avoid primitive obsession. 💡 Primitive obsession is an anti-pattern where primitive types are used too much in places where a custom type would be a better fit. By using custom types or wrapper ty...

jindraivanek.hashnode.dev2 min read

#fsharp #discriminated-union-types #dotnet #tips

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Andrés G. Aragoneses

Jan 30, 2024

member this.Value = let (ItemId value) = this in value

You lost me here. What is the in keyword and where can I learn more?

Jindřich Ivánek

F# developer

Jan 30, 2024

Andrés G. Aragoneses Yes, comment eats newlines. I edited my comment to show the code properly.

Andrés G. Aragoneses

Jan 30, 2024

Jindřich Ivánek Ok that is more understandable. I think the in keyword maybe deserves an entire blog entry for itself, so if I were you, I would decouple this blog entry from this new potential one (if you're distilling complex topics, it's better to explain them with the most basic elements, not making use of other complex topics).

Jindřich Ivánek

F# developer

Jan 31, 2024

Andrés G. Aragoneses I think it deserve note in the article. I added it. Thanks for the pointer.