Re: avoiding recursion in a dump_table function

[Jo-Philipp Wich <xm@...>]

Hi,

we use this:

--- Recursively dumps a table to stdout, useful for testing and debugging.
-- @param t	Table value to dump
-- @param maxdepth	Maximum depth
-- @return	Always nil
function dumptable(t, maxdepth, i, seen)
	i = i or 0
	seen = seen or setmetatable({}, {__mode="k"})

	for k,v in pairs(t) do
		perror(string.rep("\t", i) .. tostring(k) .. "\t" .. tostring(v))
		if type(v) == "table" and (not maxdepth or i < maxdepth) then
			if not seen[v] then
				seen[v] = true
				dumptable(v, maxdepth, i+1, seen)
			else
				perror(string.rep("\t", i) .. "*** RECURSION ***")
			end
		end
	end
end


~ Jow