lua table打印

function print_r( t )
    local print_r_cache={}
    local space = "    "
    local function sub_print_r(t, indent)
        if (type(t) == "table") then
            for pos, val in pairs(t) do
                if (type(val) == "table") then
                    print(indent .. pos .. " = " .. "{")
                    sub_print_r(val, indent .. space)
                    print(indent .. "},")
                else
                    print(indent .. pos .. " = " .. tostring(val) .. ',')
                end
            end
        else
            print(indent .. tostring(t))
        end
    end
    if (type(t)=="table") then
        print("{")
        sub_print_r(t, space)
        print("}")
    else
        sub_print_r(t, space)
    end
end

示例：

local a = {3, 4, 5}
print_r(a)