2013-11-20 46 views

回答

3

你可以使用它們使用相同的技術,但與-=運營商。

>> a = [] 
=> [] 
>> a.object_id 
=> 2154250660 
>> a << 'hello' 
=> ["hello"] 
>> a.object_id 
=> 2154250660 
>> a += ['hi'] 
=> ["hello", "hi"] 
>> a.object_id 
=> 2154228260 
>> a -= ['hi'] 
=> ["hello"] 
>> a.object_id 
=> 2154204700 
+1

感謝也證明它實際上是一個新的實例 – rthbound

1

你試過:

a -= [element]