Erlang dets的使用：增删查遍历

dets.erl

Eshell V7.3  (abort with ^G)
1> dets:open_file(bbb, [{type, bag}]).
{ok,bbb}
2> dets:lookup(bbb, "b11").     
[{"b11","b22","b32"},{"b11","b21","b31"}]
3>     
3> dets:lookup(bbb, "a11").      
[]
4>     
4> dets:insert(bbb, {"b11", "b23", "b33"}).
ok
5> dets:lookup(bbb, "b11").                
[{"b11","b22","b32"},
 {"b11","b21","b31"},
 {"b11","b23","b33"}]
6> detes:delete_object(bbb, {"b11","b22","b32"}).

** exception error: undefined function detes:delete_object/2
7> dets:lookup(bbb, "b11").                      
** exception error: bad argument
     in function  dets:lookup/2
        called as dets:lookup(bbb,"b11")
8> f().
ok
9> dets:open_file(bbb, [{type, bag}]).           
{ok,bbb}
10> dets:lookup(bbb, "b11").                      
[{"b11","b22","b32"},
 {"b11","b21","b31"},
 {"b11","b23","b33"}]
11> dets:delete_object(bbb, {"b11","b22","b32"}). 
ok
12> dets:lookup(bbb, "b11").                     
[{"b11","b21","b31"},{"b11","b23","b33"}]
13> dets:traverse(bbb, )
13> 
13> 
13> .
* 1: syntax error before: ')'
13> dets:lookup(bbb, "b11").
[{"b11","b21","b31"},{"b11","b23","b33"}]
14> dets:traverse(bbb,      
14> fun({A, B, C}) ->
14> dets:delete_object(bbb, {A, B, C}), continue end).
[]
15> dets:lookup(bbb, "b11").                          
[]