[Haskell-cafe] Software Tools in Haskell

[Henning Thielemann]

On Wed, 12 Dec 2007, Don Stewart wrote:

> ndmitchell:
> >
> > A much simpler version:
> >
> > main = print . length . words =<< getContents
> >
> > Beautiful, specification orientated, composed of abstract components.
>
> My thoughts too when reading the initial post was that it was all very
> low level imperative programming. Not of the Haskell flavour.

I remember there was a discussion about how to implement full 'wc' in an
elegant but maximally lazy form, that is counting bytes, words and lines
in one go. Did someone have a nice idea of how to compose the three
counters from implementations of each counter? I'm afraid one cannot
simply use the "split and count fragments" trick then.