[Haskell-cafe] A question about stack overflow

Udo Stenzel u.stenzel at web.de
Tue Jun 27 06:11:36 EDT 2006

Neil Mitchell wrote:
> Or if you don't want to go for a fold next, in a style more similar to
> the original:
> maximum [] = undefined
> maximum [x] = x
> maximum (a:b:xs) = maximum (max a b : xs)

It even reproduces the stack overflow, though for a different reason.
Better write it this way:

maximum [] = undefined
maximum [x] = x
maximum (a:b:xs) = let m = max a b in m `seq` maximum (m : xs)

"The condition of man is already close to satiety and arrogance, and
there is danger of destruction of everything in existence."
	-- a Brahmin to Onesicritus, 327 BC,
	   reported in Strabo's Geography
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