select (index, ···) If index is a number, returns all arguments after argument number index; a negative number indexes from the end (-1 is the last argument)

string.match (s, pattern [, init])matchpattern§6.4.1sma

luaL_pushresult[-?, +1, m] void luaL_pushresult (luaL_Buffer *B); Finishes the use of buffer B

os.rename (oldname, newname) Renames the file or directory named oldname to newname. If this function fails, it returns nil, plus a string describing

lua_rawequal[-0, +0, –] int lua_rawequal (lua_State *L, int index1, int index2); Returns 1 if the two values

lua_getmetatable[-0, +(0|1), –] int lua_getmetatable (lua_State *L, int index); If the value at the given

lua_numbertointeger int lua_numbertointeger (lua_Number n, lua_Integer *p); Converts a Lua float to a Lua integer. This macro assumes

luaL_checkoption[-0, +0, v] int luaL_checkoption (lua_State *L, int arg,

math.huge The float value HUGE_VAL, a value larger than any other numeric value.

math.acos (x) Returns the arc cosine of x (in radians).