[Haskell-cafe] Re: Is 78 characters still a good option? Was: breaking too long lines

[Achim Schneider]

Xiao-Yong Jin <xj2106 at columbia.edu> wrote:

> Gwern Branwen <gwern0 at gmail.com> writes:
> 
> > I was cabalizing a package once, and I chucked into the
> > build-depends 'ghc' and made it build. About 30 seconds later, it
> > occurred to me that this was a geometry library and what the heck
> > was it doing with the GHC API? So I go looking, and I find a module
> > of utility functions. It's importing GHC.Base.
> > I remove the import and scroll down to see the error.
> >
> > It turns out that 20 megabytes of GHC code was being linked into
> > this program for one function.
> > I took the quick way out and typed into the module: 'isJust Nothing
> > = False; isJust (Just a) = True'.
> 
> Probably I'm missing something, but why didn't you just
> import Data.Maybe?  I believe both 'isJust' and 'isNothing'
> is defined in the module.
>
...and that's TRWTF.

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