function auConcatVararg(array, ...) 
    local ret = {}
    local args = table.pack(...)
    auForEach(array, function(element) table.insert(ret, element) end)
    for i=1, args.n do
        table.insert(ret, args[i])
    end
    return ret
end

function auConcatArrays(...) 
    local ret = {}
    local args = table.pack(...)
    for i=1, args.n do
        local tbl = args[i]
        auForEach(tbl, function(re) table.insert(ret, re) end)
    end
    return ret
end