14 Sep
2006
14 Sep
'06
9:38 a.m.
On Wed, 13 Sep 2006, Magnus Jonsson wrote:
When programming the other day I ran into this problem. What I want to do is a function that would work like this:
splitStreams::Ord a=>[(a,b)]->[(a,[b])]
splitStreams [(3,x),(1,y),(3,z),(2,w)] [(3,[x,z]),(1,[y]),(2,[w])]
Interestingly we use such a routine in Haskore for splitting a sequence of notes into sequences of notes of equal instruments. It's implemented rather the same way like your version. It's 'slice' in http://darcs.haskell.org/haskore/src/Haskore/Basic/TimeOrderedList.lhs but it is a bit more complicated because it has to manage time information.