28 Jan
2013
28 Jan
'13
7:32 p.m.
On Monday, 28. January 2013 19:37:53 Bryce Verdier wrote:
Hi All,
At the moment I have a list of lists. The inner list is a coordinate, like (x,y) but is [x,y] instead. What I would like to do is group all the x's into one list, and the y's into another. I know I can do this with calling 2 maps on the container, but I would also like to do this in one iteration.
Something like this? groupMe = foldl (\[rx,ry] [x,y] -> [x:rx,y:ry]) [[],[]] *Main> groupMe [[1,2],[1,3],[2,3]] [[2,1,1],[3,3,2]] -- Martin