Re: [Haskell-cafe] curious about sum

You can make numeric class instances from arbitrary Applicatives [1]. I imagine a lot of them (e.g. Stream) would want at least some non-strictness. We might provide strict alternatives for sum and product. I wonder what else. [1] http://hackage.haskell.org/cgi-bin/hackage-scripts/package/applicative-numbe... - Conal On Sat, Jun 13, 2009 at 7:03 AM, Keith Sheppard <keithshep@gmail.com> wrote:

Is there any reason that sum isn't strict? I can't think of any case where that is a good thing.

Prelude> sum [0 .. 1000000] *** Exception: stack overflow

-Keith -- keithsheppard.name _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe