Haskell for Imperative Programmers #21 - data, type & newtype

In this video we will explore the differences between data, type and newtype!
More info on newtype: wiki.haskell.org/Newtype
Video on "data": • Haskell for Imperative...

[@edvardm4348]

These videos were in my opinion really, really well made. I'd put these videos to the same list of definite resources to go through along Hutton's Haskell book and LYAH.
Thank you so much.

[@VladTrishch]

Love this series! Please, keep it up.

[@arber10]

Very good explanation. Thanks!

[@kid-vf4lu]

This is fantastic content! If you start a patreon, I will contribute

[@alexanderskusnov5119]

1) I would add a record syntax:
data RGB = RGB {red:: Int, green:: Int, blue:: Int}
2) Why with record syntax I see an error?:
newtype RGB = RGB {red:: Int, green:: Int, blue:: Int}
but this case is legal?:
newtype RGB = RGB (Int, Int, Int)

[@philipphagenlocher]

The second case doesn't work since red, green and blue are three distinct fields for the RGB constructor. Without the record syntax it would look like this: newtype RGB = RGB Int Int Int which isn't legal since the constructor has 3 fields.
newtype RGB = RGB (Int, Int, Int) is legal since there is only one field (namely (Int, Int, Int) which is one tuple with some stuff in it).
In general, using records in conjunction with newtype is not really helpful since only one field (and thus only one name) can be introduced to the type.