[Haskell-cafe] [newbie question] Memoization automatic in Haskell?
lemming at henning-thielemann.de
Sat Jan 12 18:56:57 EST 2008
On Sat, 12 Jan 2008, David Benbennick wrote:
> On 1/12/08, Henning Thielemann <lemming at henning-thielemann.de> wrote:
> > Caching is not the default, but you can easily code this by yourself:
> > Define an array and initialize it with all function values. Because of
> > lazy evaluation the function values are computed only when they are
> > requested and then they persist in the array.
> But how can I implement memoization for a more complicated function?
> For example, perhaps I want to memoize
> f :: String -> Int -> Double -> String -> Bool
There was a long thread about a sophisticated technique called "blue
prints", which allows you to use binary search trees as memoizing
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