I have a problem with defining an instance.
module CollTree where
import Data.List(intersperse)
Say, I want to define a tree structure based on lists.
I omit the data attached to the nodes here for simplicity.
data ListTree = ListNode [ListTree]
deriving Show
This is simple
Henning Thielemann wrote:
Now I have to write 'show' related code for each collection type. This
way I probably duplicate a lot of code that is already written for the
Show instances of the collections. To be honest, I use a more special
tree structure with even more special collections so
Hi Wolfgang,
For some reason, GHCi now keeps launching every time I launch
Terminal.app, I can't even get a regular command line prompt now. I
had to uninstall all the files for GHCi manually from an X11 Xterm to
get a regular prompt. It still gets an error trying to launch GHCi,
but
Hi Wolfgang,
For some reason, GHCi now keeps launching every time I launch
Terminal.app, I can't even get a regular command line prompt now. I
had to uninstall all the files for GHCi manually from an X11 Xterm
to get a regular prompt. It still gets an error trying to launch
GHCi, but
That did the trick, thanks heaps again. I think I may have done a
Use Settings as Default after having tweaked the Terminal settings
after launching GHCi. I kept thinking it was some kind of Unix shell
startup script thing.
Xavier
On 12/03/2006, at 5:54 AM, Wolfgang Thaller wrote:
I see. The solutions on that thread, i.e.:
http://www.mail-archive.com/haskell%40haskell.org/msg17085.html
would seem to require me to at least declare an instance of some
class, for every type that I want to support. So the short answer to
I'm trying to figure out how to use STUArray. Is it
Hello Frederik,
Sunday, March 12, 2006, 5:58:42 AM, you wrote:
FE Perhaps some sort of warning in the documentation for STUArray is in
FE order, until Bulat's code can be incorporated?
excellent idea. you can make diff for Data.Array.ST/IO and send it to the
libs maillist
FE By the way, why
