[Haskell-beginners] How do you show a Data.ByteArray?

[David McBride]

You haven't actually decided what c is, just that it is some type that is
an instance of the ByteArray class.

:i ByteArray

should show:
instance ByteArray ByteString
instance ByteArray Bytes
instance ByteArray ScrubbedBytes

try

print (c :: ByteString)
print (c :: ScrubbedBytes)


On Sun, Aug 28, 2016 at 6:56 PM, <haskell at verge.info.tm> wrote:

> Prelude Data.ByteArray> c = Data.ByteArray.zero 20
> Prelude Data.ByteArray> :type c
> c :: ByteArray ba => ba
> Prelude Data.ByteArray> c
>
> <interactive>:38:1: error:
>     • Ambiguous type variable ‘a0’ arising from a use of ‘print’
>
> Uhm...
>
> Prelude Data.ByteArray> index c 3
>
> <interactive>:39:1: error:
>     • Ambiguous type variable ‘a0’ arising from a use of ‘index’
>
> I can't print a byte?
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