[Haskell-beginners] Beginners Digest, Vol 104, Issue 9

[Praveen Velliengiri]

Thanks a lot.🙂

On 15 February 2017 at 17:30, <beginners-request at haskell.org> wrote:

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> Today's Topics:
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>    1.  OPERATOR OVERLOADING AS IN C++ (Praveen Velliengiri)
>    2. Re:  OPERATOR OVERLOADING AS IN C++ (Francesco Ariis)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Tue, 14 Feb 2017 18:21:37 +0530
> From: Praveen Velliengiri <praveenvelliengiri at gmail.com>
> To: beginners at haskell.org
> Subject: [Haskell-beginners] OPERATOR OVERLOADING AS IN C++
> Message-ID:
>         <CAL56b7SMDdF+doiqyLxTM85Tgv+R=ooMrP2TaLmAHSuaBtOo+A at mail.
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> I'm new to functional programming, Whether it is possible to do operator
> overloading  in Haskell ? I go through the Idea of TYPECLASSES in Learn you
> haskell tutorial. But I can't understand the idea Can anyone suggest me
> some idea regarding Operator overloading and Type classes in Haskell.
> Thank you guys
>  Praveen v
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> ------------------------------
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> Message: 2
> Date: Tue, 14 Feb 2017 14:18:19 +0100
> From: Francesco Ariis <fa-ml at ariis.it>
> To: beginners at haskell.org
> Subject: Re: [Haskell-beginners] OPERATOR OVERLOADING AS IN C++
> Message-ID: <20170214131819.GA3107 at casa.casa>
> Content-Type: text/plain; charset=utf-8
>
> On Tue, Feb 14, 2017 at 06:21:37PM +0530, Praveen Velliengiri wrote:
> > I'm new to functional programming, Whether it is possible to do operator
> > overloading  in Haskell ? I go through the Idea of TYPECLASSES in Learn
> you
> > haskell tutorial. But I can't understand the idea Can anyone suggest me
> > some idea regarding Operator overloading and Type classes in Haskell.
> > Thank you guys
>
> Hello Praveen,
>
>     indeed Haskell uses typeclasses to deal with ad hoc polymorphism.
> Are you familiar with any of them? If I write in ghci:
>
>     λ> show 707
>     "707"
>     λ> show True
>     "True"
>     λ> show 'c'
>     "'c'"
>     λ> show "palla"
>     "\"palla\""
>
> that is possible because numerous types are instances of the typeclass
> Show, which provides `show`
>
>     λ> :t show
>     show :: Show a => a -> String
>
> Does that help a bit? Or you aren't sure about the typeclass syntax?
>
>
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> End of Beginners Digest, Vol 104, Issue 9
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