-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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] allb...@kf8nh.com system administrator [openafs,heimdal,too many hats] allb...@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.10 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkwuiMcACgkQIn7hlCsL25XSbACfZ72nV39ozNV2yvoTO1gtpewK AMMAn2mKd0j0xQ7Ns728Jzoz7Xq8GqSo =ZKBD -----END PGP SIGNATURE----- _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
