[Haskell-beginners] What to do next?

[bruce li]

Thanks for the exercises. I think I've finished all exercises except the
last 2 projects. But here are some questions regarding the exercises:

1. The layout of the typeclasses looks a bit different from Haskell, like
splitting applicative functor into apply and applicative. I wonder you
could tell me the reason.

2. How to write cooler code like  lift2 ((++) =<<) preillion postillion?
How could I make such usage a habit?

Thanks.



2014-03-20 18:15 GMT-04:00 Tony Morris <tonymorris at gmail.com>:

>  I teach FP for a living for an organisation called NICTA. This is the
> material I use primarily https://github.com/NICTA/course
>
> If you can do the easy stuff, fine. For example,
> https://github.com/NICTA/course/blob/master/src/Course/List.hs
> https://github.com/NICTA/course/blob/master/src/Course/ListZipper.hs
> https://github.com/NICTA/course/blob/master/src/Course/StateT.hs
>
> If you want it a bit harder:
> https://github.com/NICTA/course/blob/master/src/Course/Parser.hs
> https://github.com/NICTA/course/blob/master/src/Course/JsonParser.hs
> https://github.com/NICTA/course/blob/master/src/Course/Cheque.hs
>
> But if you can do any of these, then I would say you are not a beginner
> anymore:
>
> https://github.com/NICTA/course/blob/master/projects/TicTacToe/TicTacToe.markdown
>
> https://github.com/NICTA/course/blob/master/projects/NetworkServer/NetworkServer.markdown
>
>
>
> On 21/03/14 04:17, bruce li wrote:
>
> Hi, there,
> I'm relatively new to Haskell...well... I mean I haven't done anything I
> believe truely in Haskell. I have gone through materials like Learn You a
> Haskell for Real Good, Real World Haskell, most chapters in Haskell
> Wikibook, Write Yourself Scheme in 48 Hours, Algorithms: A Functional
> Approach and other materials in Haskell Wiki.
>
>  *But... what I feel is that I'm not confident while writing Haskell
> code.* Having gone through all those materials with "magic", I always
> feel I'm writing stupid code and there must be more elegant way... And...
> what's worse, I feel guilty while using IO monad but I simply cannot avoid
> it, like when I try to write code generator for a toy compiler, I need to
> keep state of the registers, which I need IORef... Then I feel its not pure
> anymore but I don't know how to get around it.
>
>  I'm wondering if anyone else shares this kind of feeling and what should
> I do next? Could anyone suggest any project to get hands on experience with
> Haskell?
>
>  Another question is that the deeper digging into functional algorithms
> design (reading the book Pearls of Functional Algorithm Design), the more
> ignorant I feel. So how do I make up the basics like fold law, list
> induction etc. Any suggested reading materials?
>
>  Well.. I think that's a lot question. Thanks for your patience and your
> kind help.
>
>
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>
> --
> Tony Morrishttp://tmorris.net/
>
>
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