Thread: Chaning the key of a hash_map entry

Hi,
I have a hash_map and I need to change a hash_map's key to another. The keys in this case are std:: strings. Say I have 2 objects registered, "obj1", "obj2". I want to rename the hash entry "obj1" to, say, "obj3". I hope this is possible..
Thanks

>I have a hash_map and I need to change a hash_map's key to another.
Hashing relies on the value of the key to directly determine location. If the key changes but the location doesn't change, you've broken the data structure in a subtle way. The only way to change the key in a hash table is to remove the record completely and rehash it (add it again) with a different key.

Ok, it works. thanks