Re: [Haskell-cafe] Newbie : What does the sequence function make?

2 May 2005


      On Monday 02 May 2005 20:52, Lennart Augustsson wrote:
...
Benjamin Franksen wrote:
...
Another way to explain what sequence does is the following
implementation, which I find a bit easier to understand for the beginner
than the one given in
http://www.haskell.org/onlinelibrary/standard-prelude.html :
sequence [] = []
sequence m:ms = do
  x <- m
  xs <- sequence ms
  return (x:xs)
Except that this definitions has a syntax error and a type error
(or just a different type if you provide no signature).
Oh dammit, sorry. This is what I meant:

sequence [] = return []
sequence (m:ms) = do
  x <- m
  xs <- sequence ms
  return (x:xs)

Cheers,
Ben