On Jul 25, 10 21:54, Tomek Sowiński wrote:
bearophile wrote:
Some people have proposed the introduction in Python of the 'where'
statement. It is quite used in Haskell:
printFreqsBySize genome keySize = do
ht0<- htNew keySize
ht<- hashGenome genome keySize ht0
l<- htToList ht
htFree ht
return $ map draw (sortBy sortRule l) ++ [""]
where
genomeLen = S.length genome
draw :: (S.ByteString, Int) -> String
draw (key, count) = printf "%s %.3f" (S.unpack key) pct
where pct = (100 * (fromIntegral count) / total) :: Double
total = fromIntegral (genomeLen - keySize + 1)
It exists in Haskell because functional languages can't describe sequences
(can't declare a temporary variable before the main expression because
there's no "before"). But I don't know Haskell so I may be wrong.
No.
quadraticSum a b = let aSquared = a*a
bSquared = b*b in
aSquared + bSquared
Anyway, where in D wouldn't bring enough return of investment to break even,
IMHO.
Tomek
