jerzy.karczmarczuk at info.unicaen.fr wrote: >> Although it could be argued that laziness is the cause of some very >> obscure bugs... <g> Niko > > Example, PLEASE. Prelude> sum [1..1000000] *** Exception: stack overflow Prelude> Data.List.foldl' (+) 0 [1..1000000] 500000500000 Tillmann