Every table must be declared in this way. Table can also be used to make an existing table empty, though this causes a memory leak. Insert adds an object and its key to a table. The key must be a string and the object can be any value. If there already is an object in the table with that key, the old object is replaced with the new.
Lookup retrieves an object from a table.
Its first parameter is a table, and the second parameter is the object's key.