16 Apr
2010
16 Apr
'10
2:50 p.m.
Prelude Control.Exception> let lst = [undefined,undefined] :: [Bool] Prelude Control.Exception> evaluate lst>>= putStrLn . take 1 . show [ Prelude Control.Exception> evaluate lst>>= print [*** Exception: Prelude.undefined
Ahh, yes you are of course right. Hmm so, how do we crack this nut without resorting to deepSeq etc.. It must be possible, because it happens when you print it! Am I going to have to resort to physically writing the output to /dev/null ? It seems like such an ordinary thing to want to do, the fact that it is hard makes me think I must be approaching this in the wrong way (which is usually the case when I get my knickers in a twist with Haskell ;) - Phil