[Haskell-cafe] Re: do nmergeIO or mergeIO preserve order?

Anatoly Yakovenko wrote:

do nmergeIO or mergeIO preserve order? or not preserve order?

If you have a list of operations "[IO a]" then the future package at http://hackage.haskell.org/cgi-bin/hackage-scripts/package/future can do this. It's 'forkPromises' function returns a "Chan a" which can be used to get the non-order preserving results (actually "Either SomeExcption a"). If you are feeling lucky you can use "getChanContents" and "filter" to get a lazy "[a]" which is the results as they are completed. -- Chris