haskell getArgs -

haskell getArgs -

how getargs work, trying read in text file terminal sends contents 1 of defined functions. can post illustration code give me thought of how works. thanks.

getargs io action produces list of string

fmap somefunction $ readfile =<< fmap head getargs

or in applicative style:

somefunction <$> readfile =<< head <$> getargs

haskell