[Jprogramming] Project Euler 16, J vs Haskell

[Devon McCormick]

In general, I've noticed that Haskell is often J's closest rival in terms
of terseness.  However, based on my admittedly slight acquaintance with
Haskell, it does not seem as general or as well-thought-out notationally as
J is but this latter point is true of almost all other languages.


On Wed, May 28, 2014 at 11:35 AM, Jon Hough <jghough at outlook.com> wrote:

> Project Euler 16 is defined:
> 215 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.What is
> the sum of the digits of the number 21000?
> http://projecteuler.net/problem=16
>
>
> My J solution:NB. create base
> base =. 302 $ 10
>
> digitsum =. +/ @:(base & #:)"1@: (1000x &(^~))   digitsum 2
> As a J beginner, clearly my code is not as terse or as elegant as it could
> be. But browsing the solution forums I found this Haskell solution:
> sum $ digits 10 $ 2^1000
>
> I don't know Haskell but the above code pretty much speaks for itself.
> Clearly the solution is terse, simple and easy to understand.Comparing
> Haskell to J, it seems one of J's strong points, terseness and rapid
> program developing, doesn't hold up to Haskell so much as it does against
> C-style languages.
> So my question is, what advantages does J hold over Haskell, in terms of
> speed, terseness etc?
> Regards.
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>



-- 
Devon McCormick, CFA