L.Guo wrote:
I have wrote the target function like this, and tested.
mkBlocks (w,h) = map concat . concat . transpose . chop h . map (chop w)
I don't understand how this relates to your original problem description. But then, again, I probably did not understand that one too well.
This is not a homework, though likely to be one.
No offense meant, of course. Anyway, as a challenge to others on the list: write a one-liner that splits an "image" like ["abcd","efgh","ijkl","mnop"], interpreted as abcd efgh ijkl mnop into the list of images: [ ab ef , cd gh , ij mn , kl op ] for (w,h)=(2,2), into: [ a e , b f , c g , d h , i m , j n , k o , l p ] for (w,h)=(1,2), and so on. (Where an image like ab ef is represented as ["ab","ef"].) Have fun, Janis. -- Dr. Janis Voigtlaender http://wwwtcs.inf.tu-dresden.de/~voigt/ mailto:voigt@tcs.inf.tu-dresden.de