[Haskell-cafe] RE: Haskell Pangolins
dominic.fox1 at ntlworld.com
Thu Dec 30 07:06:24 EST 2004
The use of elem is certainly more concise. But this isn't quite right (Hugs
> isYes = `elem` ["y", "yes", "Y", "YES"]
I think what's meant is:
isYes = flip elem ["y", "yes", "Y", "YES"]
and agree that
isYes = flip elem ["y", "yes"] . (map toLower)
is even better.
> Of course, the very last "if" could be,
> if isYes playAgain
> then play rewrittenNode
> else putStr "Goodbye for now."
I had it the other way around because of a vague notion about tail-recursion
that perhaps doesn't apply here?
It's useful to know where "do"s and parentheses are not needed. I agree
about records; I thought they would be useful, and ended up not using them.
Derek's use of LiftM is new to me, as most things in Haskell are. The @
operator (fullstring@(c:cs)) looks very handy.
Thanks to all,
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