On Mon, 15 Dec 2014 20:32:20 +0100, you wrote:
Anyway, one thing I'm running up against is that I am going to need ordered key/value collections, which I believe is something JSON does not support out-of-the-box: "objects" ({"foo":15, "bar":23}) are conceptually unordered key/value collections (and Aeson treats them as such, using hash maps as the intermediate storage format), so I lose ordering; OTOH, flat lists ([15, 23]) do not have keys, and lists of "pairs" (two-element lists) produce uglier syntax ([["foo",15], ["bar",23]]), but they are the "correct" solution.
I think this: [{"foo":15}, {"bar":23}] makes more sense than this: [["foo", 15], ["bar", 23]] as it maintains the key vs. value distinction. But you are correct that in JSON, arrays are ordered but objects are not. -Steve Schafer