ets - 内建的变量存储机制
- all/0
- delete/1
- delete/2
- delete_all_objects/1
- delete_object/2
- file2tab/1
- first/1
- foldl/3
- fun2ms/1
- give_away/3
- i/0
- i/1
- info/1
- info/2
- insert/2
- insert_new/2
- is_compiled_ms/1
- last/1
- lookup/2
- lookup_element/3
- match/1
- match/2
- match/3
- match_delete/2
- match_object/1
- match_object/2
- match_object/3
- match_spec_compile/1
- match_spec_run/2
- member/2
- new/2
- next/2
- prev/2
- rename/2
- safe_fixtable/2
- select/1
- select/2
- select/3
- select_delete/2
- select_reverse/1
- select_reverse/2
- select_reverse/3
- tab2file/2
- tab2file/3
- tab2list/1
- to_dets/2
- update_element/3