[erlang-questions] Erlang again!

Dale Harvey <>
Fri Jul 23 13:58:46 CEST 2010


On 22 July 2010 18:08, Masklinn <> wrote:

> On 2010-07-22, at 18:55 , Boris Mühmer wrote:
> >
> > Is such a solution plain bad, or just a newbie mistake/error?
>
> I would say it's a not-very-useful reimplementation of something which
> already exists in the stdlib. It's mostly a question of not knowing your
> toolbox, so I wouldn't say it's bad, but it definitely isn't optimum.
>
> On the other hand, the Erlang toolbox isn't very discoverable/searchable so
> you have to read it all (several time if needed).
>
>
The major reason I wrote erldocs, its makes the docs fairly discoverable
http://erldocs.com/?search=zip


> That's a big advantage of haskell and its strong typing: hoogle[0] lets you
> search functions by type. In this case you can search for [a] -> [b] -> [c]
> (a function taking a list of 'a's, a list of 'b's and returning a list of
> 'c's) and the first result is zipWith[1].
>
> It's not perfect though, as a search for [Int] -> [Int] -> [Int]
> demonstrates[2] with zipWith ending up on the third page of the results, and
> the return of such functions as `drop :: Int -> [a] -> [a]`.
>
> [0] http://haskell.org/hoogle/
> [1] http://haskell.org/hoogle/?q=[a]%20->%20[b]%20->%20[c]
> [2] http://haskell.org/hoogle/?hoogle=[Int]+-
> >+[Int]+->+[Int]&start=41#more
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