ex

local chest = peripheral.wrap("right")
local size = chest.getInventorySize()
local oresDir = "south"
local dustsDir = "north"
chest.condenseItems()

local oArray = {"15:0", --iron ore
                     "30888:17", --iron solution
                     "14:0", --gold
                     "30888:18"}
local dArray =  {"30888:1", --iron dust
                     "30888:9", --iron slurry
                     "30888:2", --gold dust
                     "30888:10"}
print("size is: " .. size)
--pulled = chest.pullItemIntoSlot("west", 1, 64, 1)
--pushed = chest.pushItemIntoSlot("west", 1, 64, 1)
--print(pushed)
--see if item is extractable
function isOre(ore)
    for k,v in pairs(oArray) do
      if (ore == v) then
        return true
      end
    end
    return false
end

function isDust(dust)
    for x,y in pairs(dArray) do
      if (dust == y) then
        return true
      end
    end
    return false
end

--isOre(15)

--loop throught the inventory
for i=1,size do
  print (i)
  local id = chest.getStackInSlot(i)
  if (id ~= nil) then
    local combID = tostring(id["id"])..":"..tostring(id["dmg"])
    --print (combID)
    --print (type(combID))
      if (isOre(combID)) then
         --print(id["name"])
         chest.pushItem(oresDir,i,64)
    elseif (isDust(combID)) then
       --print(id["name"])
       chest.pushItem(dustsDir,i,64)
     end

  end
end