Comments on: SOLID Part I – The Open/Closed-Principle – C# vs. F#

By: Steffen Forkmann

Steffen Forkmann — Wed, 26 Aug 2009 07:06:42 +0000

Hi SooHyoung,

thanks for the hint.

let checkRules rules element = List.tryPick ((|>) element) rules

Now the generic rule checker is really nice.

Regards Steffen

SooHyoung Oh — Wed, 26 Aug 2009 04:27:10 +0000

How about using List.pick or List.tryPick? (F# 1.9.6.16)

type SpamResult = Spam | OK

rule’s type: EMail -> SpamResult option

let checkRules rules email = List.pick ((|>) email) rules

Steffen Forkmann — Tue, 25 Aug 2009 07:00:30 +0000

Hi Diego,

the reason is I simply forgot that this is also valid.

Regards,
Steffen

Diego — Mon, 24 Aug 2009 18:46:09 +0000

I’m just wondering…
Is there any reason for writing the pattern:
_ as other
instead of simply:
other?

Alexander Groß — Mon, 24 Aug 2009 10:04:50 +0000

Alex please correct me if I’m wrong, but I think this is what you had in mind Friday.

This is absolutely what I had in mind when we talked about OCP!