> numLines :: [Line] -> [(Int, Line)] > numLines lines -- list of pairs of > = zip [1 .. length lines] lines -- line no. & line >
zip stops when it reaches the end of the shorter list, so you can just say zip [1 ..] lines In fact, most programmers use the infix version of zip, like this: [1..] `zip` lines which is nicely readable. (any function can be turned into an infix by surrounding it in `backticks`). --KW 8-) -- Keith Wansbrough <[EMAIL PROTECTED]> http://www.cl.cam.ac.uk/users/kw217/ University of Cambridge Computer Laboratory. _______________________________________________ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
