[Haskell-cafe] Haskell not ready for Foo [was: Re: Hypothetical Haskell job in New York]

David Leimbach leimy2k at gmail.com
Fri Jan 9 10:11:29 EST 2009

> So, if I need to write *now* a network application, should I *invest* in
> Haskell, or should I just *use* Erlang?

You're in Haskell-Cafe... the bias is there already for Haskell.

Personally, I don't have experience doing network applications in Haskell,
but I've got about a year's worth or more using Erlang, so for me it's a
pretty easy choice, and I wouldn't pick Haskell today.

(hearing boos in the background as I type this...)

However, I would invest in learning to use Haskell, because my experience
with Erlang has been that it really is pretty great, and has lovely
features, like the ability to shell into a running process and poke around
if something seems not quite right, or even to ssh into it if you run the
right services.  Plus there's tons of stuff pre-written for network
applications that just comes with the Erlang distribution, meaning there's
nothing else to install.... but even after all of that, I miss the type
safety of Haskell, as it's really painful to do this in erlang

function(T1, T2, T3) when is_list(T1) and is_integer(T2) and is_integer(T3)
    ....function body

Even if you have a list, you don't know "what of" so you never really get
the guarantees that you get when a Haskell program successfully compiles...
 That peace of mind is not easily won in Erlang, except by lots of testing.


> As a counter example: I really don't like SQL.
> However I have to use it, if I don't want to re-implement a database by
> myself.
> The same can be said with Fortran.
> > [...]
> Regards   Manlio
> _______________________________________________
> Haskell-Cafe mailing list
> Haskell-Cafe at haskell.org
> http://www.haskell.org/mailman/listinfo/haskell-cafe
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