Oke,

So I can do this when adding a center point.

Data schape = Circle float (float,float)
| Rectange float float (float, float)

Roelof

Op 7-11-2015 om 23:03 schreef Alex Belanger:

I feel the latter example serves only documentation purposes. Maybe describe what those floats are in the former example and you can ignore the extra type aliases entirely.

Introducing a new concern for your module/application when it appears only once might just add extra complexity.

Of course, as the codebase grows and this datatype evolves, you'll probably want to go that route, but until then, I think it's preemptively unecessery.

- nitrix

On Nov 7, 2015 4:56 PM, "Roelof Wobben" <r.wobben@home.nl> wrote:

Hello,

In the book there is a example of this data-structure.

data Shape = Circle float float
| Rectangle float float

Now I have to change it to add a center point.

But I wonder if this is not a better way to describe it

Data Schape = Circle Radius
| Rectangle Width Height

Type Radius = Float
type Width = Float
type Height = Float

Roelof

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