local json = require "json"The json package is taken from dkjson.lua.
dkjson.lua is a JSON Module for Lua.
Please check dkjson.lua for further information.
LuaX applies a patch to dkjson.lua to specify the key order with a
function instead of a list. If the keyorder parameter is a function,
it is used to build the ordered element list. Otherwise it shall be a
list of fields as implemented in the original dkjson.lua.
E.g.:
local t = {x=1, y=2, z=3}
local sorted = json.encode(t, {keyorder=F.keys})
local reversed = json.encode(t, {keyorder=F.compose{F.reverse, F.keys}})
-- sorted is {"x":1,"y":2,"z":3}
-- reversed is {"z":3,"y":2,"x":1}