在表格中循环，直到找到2个特定的值？

这是一个与游戏相关的代码片段，它会遍历每个背包的每个槽位，直到找到铲子和绳子为止。

local continue
local foundShovel, foundRope
        for i = 0, Container.GetLast():Index() do -- looping trough backpacks
        local cont = Container(i)
            for j = 0, cont:ItemCount()-1 do -- looping trough each slot
            local id = cont:GetItemData(j).id -- Getting ID of that slot
            foundShovel, foundRope = GetToolIndex(id,0) or foundShovel,GetToolIndex(id,1) or foundRope -- confusing...
                if foundShovel and foundRope then
                    continue = true
                    break
                end
            end
            if continue then
               -- do something i need to do
            end
        end
    end
-- Switches ID to corresponding index :
function GetToolIndex(id,retrn)
    local shovel = {
    [9598] = 4 , -- whacking driller of fate
    [9599]= 4 , -- whacking driller of fate(jammed)
    [9596]= 3 , -- squeezing gear of girlpower
    [9597]= 3 , -- squeezing gear of girlpower(jammed)
    [9594]= 2 , -- sneaky stabber of elitenesss
    [9595]= 2 , -- sneaky stabber of elitenesss(jammed)
    [5710]= 1, -- light shovel
    [3457] = 0 -- shovel
    }
    local rope = {
    [646]= 1, -- elvenhair rope
    [3003] = 0, -- rope
    [9598] = 4 , -- whacking driller of fate
    [9599]= 4 , -- whacking driller of fate(jammed)
    [9596]= 3 , -- squeezing gear of girlpower
    [9597]= 3 , -- squeezing gear of girlpower(jammed)
    [9594]= 2 , -- sneaky stabber of elitenesss
    [9595]= 2  -- sneaky stabber of elitenesss(jammed)
    }
    if retrn == 0 then
        return shovel[id]
    elseif return == 1 then
        retrn rope[id]
    end
end

但它不起作用，我在想这种方法是否有更好的方法，如果我需要在表中找到X个值，而不仅仅是2个呢？我希望我的问题可以在这里得到理解。