Ah yes, thanks, we discussed it several times over on the arc forum (e.g. http://arclanguage.org/item?id=10791 http://arclanguage.org/item?id=10791) I was aski

Ah yes, thanks, we discussed it several times over on the arc forum (e.g. http://arclanguage.org/item?id=10791 http://arclanguage.org/item?id=10791) I was asking more about code in the wild that uses accumulate instead of the naive recursive formulation. That's typically what we mean by idiomatic. I see foldl often in haskell, but rarely in scheme. I'm not disagreeing that it's a great idea, just that this is how it 'would have been written'. Personally I find the naive recursive formulation plenty clear.