Hello Neil,
Thursday, September 7, 2006, 1:45:03 AM, you wrote:
Currently I have a single module that provides reading operations
for Integers and Ints. I'm not quite sure what to do with it.
Get it into base! Where it is, or what its called is less relevant -
perhaps entirely decoupled
What about negative numbers?
Also, don't use (ord c - ord '0'), it doesn't work with Unicode digits.
That's why there is a digitToInt function.
-- Lennart
On Sep 7, 2006, at 02:12 , Bulat Ziganshin wrote:
readI = foldl f 0
where f m c | isDigit c = fromIntegral (ord c - ord '0')
Lennart Augustsson wrote:
Also, don't use (ord c - ord '0'), it doesn't work with Unicode digits.
That's why there is a digitToInt function.
FWIW, in Haskell 98, isDigit and digitToInt are defined as
isDigit c= c = '0' c = '9'
digitToInt :: Char - Int
digitToInt c
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Bertram Felgenhauer wrote:
I can't comment on why Bulat doesn't like negative numbers.
Neither it seems, did the original Haskell committee - that's why we have to
muddle along with a confusing unary minus operator instead of proper
negative literals - see the thread beginning
