Lua颜色分类：三路分区的荷兰国旗

local function sortColors(a)
    local low, mid, high = 1, 1, #a
    while mid <= high do
        if a[mid] == 0 then
            a[low], a[mid] = a[mid], a[low]
            low = low + 1
            mid = mid + 1
        elseif a[mid] == 2 then
            a[mid], a[high] = a[high], a[mid]
            high = high - 1
        else
            mid = mid + 1
        end
    end
    return a
end

local p = getplayerbyname("flag01")
local a = sortColors({2, 0, 2, 1, 1, 0})
sendmsg(p, 1, table.concat(a, ","))