C# Records are Functional - Try Them Out That Way!

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In this video, we are demonstrating use of a record as part of a functional domain model. You will see common functional separation of types and functions, where a specialized function applies to the record as an extension method. We are contrasting this modeling style to traditional object-oriented modeling, emphasizing the benefits of functional design - namely, simplicity, isolation of dependencies, and simplicity of the underlying type system.
Learn more from video courses:
Beginning Object-oriented Programming with C# ► codinghelmet.com/go/beginning...
Collections and Generics in C# ► codinghelmet.com/go/collectio...
Making Your C# Code More Object-oriented ► codinghelmet.com/go/making-yo...
Other courses at Pluralsight ► codinghelmet.com/go/pluralsight
Other courses at Udemy ► codinghelmet.com/go/udemy
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[@zoran-horvat]

Become a patron and get access to source code and exclusive live streams: www.patreon.com/posts/c-records-are-81380375

[@StevenJAckerman]

Zoran - very illuminating, as usual. Love your approach using records to implement functional style programming.

[@wojciechwilimowski985]

I like the formatting on the chained ternary operator. It's surprisingly readable, reads like a flowchart. I would even move 'video with...' to a new line

[@heinzriemann3213]

I never understood the disregard for ternary operators. They are so much better than if-else statements.

[@kostasgkoutis8534]

Excellent! I am eagerly waiting for your course.

[@muhamedkarajic]

Great video!

[@tuberklz]

kudos Zoran. learned so much from you.

[@Darebit2k1]

gracias por la explicación, muy clara

[@kristianaranda]

Have you already published your video on functional programming in PL? I don't see it yet. Thanks!

[@zoran-horvat]

It is in the publishing queue right now. I don't have any info how long it will take until published, but it shouldn't be more than a few days.

[@anarhistul7257]

Mr Zoran do you have a place where you put the videos you're in on other youtube channels?

[@zoran-horvat]

This is the playlist with conference and other talks published in other channels: th-cam.com/play/PLSDYwLgFqaX7ceTlvJ8MVjOh3C9PTfpki.html

[@anarhistul7257]

@@zoran-horvat thank you

[@francoismouchati8189]

The public ctor with no invariant check is an issue. This is while, although it's more verbose, I'd still do the exact same functional approach with a class with a private ctor and immutable properties.

[@zoran-horvat]

Recode is a value. It cannot tell which invariants are in effect in the context where it is used.

[@andreoliveirasantos9727]

Muito bom

[@a-s733]

Would be nice to have the course about functional programming on Udemy. I am not member of Pluralsight and it is expencive.

[@zoran-horvat]

That will not be possible any time soon, because of my contractual obligations. For the same reason, I am taking care not to repeat themes from the course on TH-cam.

[@alexlo2621]

What about the validation? I see I can create a video with a bad title and nothing prevent me from doing this
var badVideo = video with { Title = "Some Bad title" };
var nullVideo = video with { Title = null };

[@zoran-horvat]

That is a good question, and I plan to make a video only on that topic.
The short answer is that records are modeling values, and hence they do not know what valid means - it depends on the context in which the object is used. For instance, a video with null title could be valid after deserialization, though not valid in a later processing stage.
As a comparison, imagine the same question regarding an int. An integer value cannot validate itself. It can only be validated by the outer entity which controls it.

[@marklord7614]

Looking to take your coding to the next level? Follow Zoran Horvat! I can't wait for the course.

[@ahmedameen2]

Is oop going to die?

[@zoran-horvat]

Nope.