[Haskell-cafe] Re: Just for a laugh...

Andrew Coppin writes:

Jon Fairbairn wrote:

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"David House" writes:

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On 31/05/07, Andrew Coppin wrote:

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If you're bored... can you come up with a solution to this?

Try using floatToDigits: http://haskell.org/ghc/docs/latest/html/libraries/base/Numeric.html#v%3Afloa...

"floatToDigits takes a base and a non-negative RealFloat number, and returns a list of digits and an exponent."

I think you also need floatRadix and floatDigits.

Note that the challenge asks for the "internal" bitmap representation of an IEEE double-precision integer - not the mathematical binary expansion.

Hence my remark above.

(In particular, things like Infinity and NaN have special bit sequences.)

Did I mention that this is a silly challange yet?

Yes, but you didn't say that it's not only silly but demonstrates the opposite of expressiveness as it's all about breaking an abstraction and must be non-portable code (because it's definition is that it won't give the same results on different hardware), so such code should be *hard* to write in a good language. -- Jón Fairbairn Jon.Fairbairn@cl.cam.ac.uk http://www.chaos.org.uk/~jf/Stuff-I-dont-want.html (updated 2007-05-07)