[Haskell-cafe] map (-2) [1..5]

David House dmhouse at gmail.com
Thu Aug 17 04:52:09 EDT 2006

On 17/08/06, Tamas K Papp <tpapp at princeton.edu> wrote:
> The code in the subject generates an error.  I understand why this is
> (- is treated as part of the number), but I don't know how to solve
> it, ie how to tell Haskell that - is a function/binary operator?

There's a Prelude function for exactly this purpose, which leads your
code still quite readable:

Prelude> map (subtract 2) [1..5]

-David House, dmhouse at gmail.com

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