Hello, I'm new to Haskell and this is my first post to this forum. A few questions right off the bat: 1) Is this the right place for newbies to post questions about Haskell? 2) Is there a FAQ for Haskell questions? 3) Are there any active Haskell user groups in the Chicago area? A more technical question: I'm messing around with basic Haskell examples on eclipse using the FP add-on running over GHC. The following code works: pred :: Int -> Int pred 0 = 0 pred n = n-1 The following code doesn't: pred :: Int -> Int pred 0 = 0 pred n+1 = n Does anyone know why this might be? "Thanks" and "I apologize" in advance. dan
On Thu, Mar 7, 2013 at 7:45 PM, Dan Lior <sitiposit@gmail.com> wrote:
1) Is this the right place for newbies to post questions about Haskell?
This is most a list for announcements; beginners@haskell.org is better for these kinds of questions, and haskell-cafe@haskell.org for general discussion. pred :: Int -> Int
pred 0 = 0 pred n+1 = n
n+k patterns were part of Haskell '98, but removed from Haskell 2010. You may be able to use the pragma {-# LANGUAGE NPlusKPatterns #-} to turn them back on. -- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net
On 8 March 2013 11:56, Brandon Allbery <allbery.b@gmail.com> wrote:
On Thu, Mar 7, 2013 at 7:45 PM, Dan Lior <sitiposit@gmail.com> wrote:
1) Is this the right place for newbies to post questions about Haskell?
This is most a list for announcements; beginners@haskell.org is better for these kinds of questions, and haskell-cafe@haskell.org for general discussion.
pred :: Int -> Int pred 0 = 0 pred n+1 = n
n+k patterns were part of Haskell '98, but removed from Haskell 2010. You may be able to use the pragma
{-# LANGUAGE NPlusKPatterns #-}
to turn them back on.
Even then, you need to have "pred (n+1) = n".
-- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net
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-- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com http://IvanMiljenovic.wordpress.com
On Thu, 7 Mar 2013, Dan Lior wrote:
Hello,
I'm new to Haskell and this is my first post to this forum.
A few questions right off the bat:
1) Is this the right place for newbies to post questions about Haskell? 2) Is there a FAQ for Haskell questions?
http://www.haskell.org/haskellwiki/Category:FAQ
3) Are there any active Haskell user groups in the Chicago area?
I don't know, but user groups can be found at: http://www.haskell.org/haskellwiki/Category:Community
participants (4)
-
Brandon Allbery -
Dan Lior -
Henning Thielemann -
Ivan Lazar Miljenovic