function printbl(tbl, tlt)
    title = title or "";
    print("printTable  length: "..#datas..' |'..title);
    for k,v in ipairs(tbl) do
        print(v);
     end  
end   


function printf(fmt,...)
    fmt = fmt or ""
    local args = table.pack(...)
    local argsNum = args.n
    if argsNum <= 0 then
        return print(fmt)
    end
    fmt = tostring(fmt)
    local argStr = ""
    for i = 1,argsNum do
        argStr = string.format("%s arg%s:%s ",argStr,i,tostring(args[i]))
    end
    print(fmt..argStr)
end