[Haskell-beginners] why is something different within a function when it comes out?

14 Jul 2010

      i have this:

main = do

    c <- readFile "test.txt"
    let tleP = "<title>\n(.*)\n</title>"
    let tle = c=~tleP::[[String]]
    putStrLn $ tle!!0!!1

    let g = xtract tleP c
    putStrLn $ show g 

xtract p c = do
    let r = c=~p::[[String]]
    return r!!0!!0!!1

for the first putStrLn i get:
League of Humane Voters Home Page

for the second i get 
"League of Humane Voters Home Page"
but only after i have done r !!0 !!0 !!1

whereas i only needed tle !!0 !!1

it seems to me that both tle and r serve the same purpose though they
come out as different types r being a string and tle being i don't know
what because i get a "Not in scope: 'tle'

so even though both r and tle are set as [[String]], they don't seem to
be the same creature.

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prad

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