Evan Laforge
Most of the (non-IO) runtime errors I get using Haskell software is due to head or fromJust, it's actually quite annoying.
Just singling this one out because I've heard it before. I've never gotten a runtime error from these. It seems quite easy to just not use these functions.
Unfortunately, it is quite easy to just use them, too :-) Sometimes I just *know* that this list will never be empty, or that that Maybe will never be nothing - but often I'm wrong. Maybe is in a sense easier, as 'Maybe a' and 'a' are different types, while there isn't a similarly elegant type distinction between lists that may be empty and lists with at least one element. Maybe is really quite brilliant. -k -- If I haven't seen further, it is by standing in the footprints of giants