[Haskell-cafe] ANNOUNCE: hs-cryptohash 0.4

[Brandon S Allbery KF8NH]

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On 7/2/10 17:24 , Gregory Crosswhite wrote:
> The problem with this approach is that the hash context isn't a monoid;  you
> can absorb data into the context, but you can't combine two hash contexts to
> form a new one.  Thus, the Writer monad won't work for this purpose.

No?  The context is simply a String, which is a monoid, and you can combine
contexts quite meaningfully before you actually compute the final hash (in
fact, that's the whole point!).

- -- 
brandon s. allbery     [linux,solaris,freebsd,perl]      allbery at kf8nh.com
system administrator  [openafs,heimdal,too many hats]  allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university      KF8NH
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