Category Archives: lua

> is there still any > equivalent way to have Lua run a particular function after each > garbage collection in the current version? You can try something like this: mt = {__gc = function () create_new_userdata_with_metatable(mt) end } create_new_userdata_with_metatable(mt) … Continue reading →

If you want the gory details, there is another relevant stuff in the interaction between weak tables and userdata that is missing from the manual. Assume a userdata U that has a finalizer (a __gc metamethod). If U appears as … Continue reading →

from Lua FAQ : __gc for tables create a userdata; make the table the userdata’s environment table, and place a reference to the userdata in the table. (Make sure that this is the only reference to the userdata.) When the … Continue reading →

Rici Lake to Lua I very fond of the following idiom: function wordsToSet(str, rv) rv = rv or {} for k in str:gmatch”%S+” do rv[k] = k end return rv end example = wordsToSet[[foo bar baz]]