Re: [Haskell-cafe] Clarification Please

2007-09-14 Thread Andrew Wagner
You may also find this function helpful. I'll let you work out why/how: uncurry :: (a - b - c) - (a, b) - c uncurry f p = f (fst p) (snd p) On 9/13/07, Krzysztof Kościuszkiewicz [EMAIL PROTECTED] wrote: On Fri, Sep 14, 2007 at 03:45:02AM +0100, PR Stanley wrote: 5. Using merge, define a

[Haskell-cafe] Clarification Please

2007-09-13 Thread PR Stanley
Hi Taken from chapter 6, section 8 of the Hutton book on programming in Haskell: 5. Using merge, define a recursive function msort :: (Ord a) = [a] - [a] that implements merge sort, in which the empty list and singleton lists are already sorted, and any other list is sorted by merging together

Re: [Haskell-cafe] Clarification Please

2007-09-13 Thread Michael Vanier
Define a merge function that merges two sorted lists into a sorted list containing all the elements of the two lists. Then define the msort function, which will be recursive. Mike PR Stanley wrote: Hi Taken from chapter 6, section 8 of the Hutton book on programming in Haskell: 5. Using

Re: [Haskell-cafe] Clarification Please

2007-09-13 Thread PR Stanley
I'm not sure. We start with one list and also, perhaps I should have mentioned that I have a merge function which takes two sorted lists with similar, now, what do they call it, similar orientation? and merges them into one sorted list. e.g. merge [1, 4,] [2, 3] [1,2,3,4] Cheers, Paul At

Re: [Haskell-cafe] Clarification Please

2007-09-13 Thread Michael Vanier
OK, you have the split function, and you have the merge function, and now you have to define the msort function. First write down the base cases (there are two, as you mention), which should be obvious. Then consider the remaining case. Let's say you split the list into two parts. Then what

Re: [Haskell-cafe] Clarification Please

2007-09-13 Thread Krzysztof Kościuszkiewicz
On Fri, Sep 14, 2007 at 03:45:02AM +0100, PR Stanley wrote: 5. Using merge, define a recursive function msort :: (Ord a) = [a] - [a] that implements merge sort, in which the empty list and singleton lists are already sorted, and any other list is sorted by merging together the two lists