[Haskell-cafe] Memo + IORef

[Tony Morris]

I was told on #haskell (IRC) the other day that it is possible to write
a general memoisation table using IORef and unsafePerformIO. I can't
think of how this can be achieved without writing to a file, since a
function cannot hold state between invocations. What am I missing?

-- 
Tony Morris
http://tmorris.net/


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