Aggregate values in a redis sorted set. Returns {count, sum, min, max}

redis-aggregate.lua

local result = redis.call('zrange', KEYS[1], 0, -1, 'withscores')

local count = 0
local sum = 0
local min = 0
local max = 0

for i=1, #result, 2 do
   local score = result[i + 1]

   count = count + 1
   sum = sum + score

   if i == 1 then
       min = score
       max = score
   else
       min = math.min(min, score)
       max = math.max(max, score)
   end
end

return {
    count, sum, min, max
}

try using zscan