Heinrich, thanks for some great help and food for thought!
(More on performance of your solution below)
Thanks for describing the background of this problem in detail! I was
mainly asking because I'm always looking for interesting Haskell
topics
that can be turned into a tutorial of sorts,
On 31/12/2009, at 6:38 PM, Luke Palmer wrote:
On Wed, Dec 30, 2009 at 9:39 PM, Peter Green kinch1...@me.com wrote:
I can guess that there might be be less laziness and more
instantiation when
sorting is introduced,
Yes, by a lot. Sorting requires keeping the entire list in memory.
And
Hi,
explode [[[1,2],[3],[4,5,6]], [[1, 2], [14,15], [16]]] -- [[1,3,4],
[1,3,5],[1,3,6],[2,3,4],[2,3,5],[2,3,6],[1,14,16],[1,15,16],
[2,14,16],[2,15,16]]
I don't think the following will solve your problem, but explode can be
rewritten with existing functions thanks to the list monad:
On Wed, Dec 30, 2009 at 9:39 PM, Peter Green kinch1...@me.com wrote:
I can guess that there might be be less laziness and more instantiation when
sorting is introduced,
Yes, by a lot. Sorting requires keeping the entire list in memory.
And Haskell lists, unfortunately, are not that cheap in
Am Donnerstag 31 Dezember 2009 11:38:51 schrieb Luke Palmer:
This cartesian product varies in its tail faster than its head, so
every head gets its own unique tail. If you reverse the order of the
bindings so that it varies in its head faster, then tails are shared.
If my quick and dirty
On Thu, Dec 31, 2009 at 03:38:51AM -0700, Luke Palmer wrote:
But if you're serious, you can probably do better than just generating
them all and passing them to sort. I get the impression that there is
some structure here that can be taken advantage of.
Isn't what he wants a trie? In
I'm a Haskell neophyte, so may be missing something obvious in the
problem outlined below. I'm fairly proficient in Python + have some
limited experience in OCaml and F#, so know just enough to be be
dangerous, but not nearly enough to really know what I'm doing here.
OK, I have text files
On Wed, Dec 30, 2009 at 8:39 PM, Peter Green kinch1...@me.com wrote:
I'm a Haskell neophyte, so may be missing something obvious in the problem
outlined below. I'm fairly proficient in Python + have some limited
experience in OCaml and F#, so know just enough to be be dangerous, but not
nearly
