[-0, +0, -]
size_t lua_objlen (lua_State *L, int index);
Returns the "length" of the value at the given acceptable index:
for strings, this is the string length;
for tables, this is the result of the length operator ('# ');
for userdata, this is the size of the block of memory allocated
for the userdata;
for other values, it is 0. |