Best way of “looping over a 2-D array”, using Repa

Question

I find the array library Repa for Haskell very interesting, and wanted to make a simple program, to try to understand how to use it. I also made a simple implementation usin

Answer 1

I've added some advice about how to optimise Repa programs to the Haskell wiki: http://www.haskell.org/haskellwiki/Numeric_Haskell:_A_Repa_Tutorial#Optimising_Repa_programs