[Haskell-beginners] Data type

[Matthew Moppett]

Here's a quick example using ghci:

Prelude> let a = Person length
Prelude> :type a
a :: Person
Prelude> (firstName a) "Bob"
3


On Tue, May 5, 2015 at 10:19 PM, Shishir Srivastava <
shishir.srivastava at gmail.com> wrote:

> Hi,
>
> Could anyone please have a look and let me know how you can create the
> instance of this data type ?
>
> ---
>  data Person = Person { firstName ::String -> Int }
> ---
>
> I've seen this type of syntax in a lot of places in haskell code where a
> new data type is defined in terms of functions rather than concrete data
> types.
>
> I am not trying to achieve anything out of this but purely as an exercise
> in understanding the record syntax.
>
> As far as I understand the data type is function based and takes a
> 'function' instead of a value of a concrete type so how does one create an
> instance of this type.
>
> Thanks,
> Shishir
>
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