On Oct 12, 2011, at 2:36 PM, Alexander Gladysh wrote: > Most notably table.getn(), string:len(), table.foreach(). string.len is well and kicking, thank you very much :) http://www.lua.org/manual/5.1/manual.html#pdf-string.len The length operator is new (in 5.1): http://www.lua.org/manual/5.1/manual.html#2.5.5 Perhaps you should write a FAQ :))