Re: avoiding recursion in a dump_table function

[Peter Cawley <lua@...>]

On Tue, May 10, 2011 at 4:46 PM, Dave Collins
<Dave.Collins@mercatustechnologies.com> wrote:
>> function dump_table(t, prefix, seen)
>>       prefix = prefix or ""
>>       seen = seen or {}
>>       if seen[t] then
>>           print(prefix .. " is recursive")
>>       else
>>          seen[t] = t
>>           local k,v
>>          for k,v in pairs(t) do
>>                if(type(v) == "table") then
>>                       dump_table(v, prefix .. k .. ":",seen)
>>                 else
>>                       print(prefix .. k .. "=" .. tostring(v))
>>                 end
>>           end
>>       end
>> end
>
> Cool. What do I pass to this param 'seen'?

Nothing; the first two lines provide the default values for 'prefix'
and 'seen' (though you can provide 'prefix' if you want to).