local tbl = setmetatable({}, { --you can use setmetatable(tbl, {... for an already existing table
    __tostring = function(v)
        return string.Implode(" ", v)
    end,
})

tbl[1] = "noo"
tbl[2] = "yjaisd"

print(tbl)
print("\n")
print(tbl[1])
print(tbl[2])