10 Nov
2008
10 Nov
'08
1:02 p.m.
Hello! I'm tryig to write efficient code for creating histograms. I have following requirements for it: 1. O(1) element insertion 2. No reallocations. Thus in place updates are needed. accumArray won't go because I need to fill a lot of histograms (hundrends) from vely long list of data (possibly millions of elements) and it will traverse input data for each histogram. It seems that I need to use mutable array and/or ST monad or something else. Sadly both of them are tricky and difficult to understand. So good examples or any other ideas greatly appreciated. -- Alexey Khudyakov