On Sun, 3 Feb 2002, Jay Cox wrote:

If checkWid is never invoked, then possibly it is never forced to begin with, which I think means the bug is elsewhere in your code (or elsewhere).

Which turns out to be the case, although I haven't pinned it down completely--please see my follow-up post on the same subject.

btw, your original map function could possibly be better written as a zipWith as in..

zipWith (\w s -> checkWid ShowList w s) widNodes [0..]

zipWith is mentioned in the Prelude and is a fairly widely used higher-order function.

Neater than what I have, but not quite as obvious as documentation to me (since I have not frequently used zipWith). I will probably replace my code with your suggested code when I remove the scaffolding (read crutches) from my half-built program. Thanks for the hint. Best, Murray Gross mgross@dorsai.org