没有任何信息的stl地图 [英] stl map without any information
问题描述
有没有办法在没有任何相关信息的情况下使用地图
带钥匙？我不需要用钥匙存储任何信息。
map< char *，>
我不想浪费任何空间并保持信息
我的钥匙只会浪费空间。如果无法做到这一点，那么
我可以添加哪一块最小的垃圾？
map< char *，char> ？
或者在空间方面有更好的东西。
谢谢，
--j
Is there a way to use map without any information associated
with keys? I do not need any information stored with the keys.
map<char * , >
I do not want to waste any space and keeping information with
my key will just waste space. If this can not be done, what is
smallest piece of junk i could add?
map<char *,char> ?
Or is there something better in terms of space.
Thanks,
--j
推荐答案
http://www.sgi.com/tech/stl/hash_set.html
可能这就是你要找的东西： - /
http://www.sgi.com/tech/stl/hash_set.html
probably this is what you are looking for :-/
set< char *>
set< char* >
John写道：
有没有办法使用没有任何相关信息的地图
钥匙？我不需要用钥匙存储任何信息。
map< char *，>
我不想浪费任何空间和保持信息
我的钥匙只会浪费空间。如果无法做到这一点，我可以添加什么最小的垃圾呢？
map< char *，char> ？
或者在空间方面有更好的东西。
Is there a way to use map without any information associated
with keys? I do not need any information stored with the keys.
map<char * , >
I do not want to waste any space and keeping information with
my key will just waste space. If this can not be done, what is
smallest piece of junk i could add?
map<char *,char> ?
Or is there something better in terms of space.
std :: set。如果你要存储指针，你还需要通过
a比较函数来获得有意义的结果 - 否则，它将会b / b
尝试比较指针本身，而不是他们指出的。
结果通常不会有用。
或者，您可能希望存储类似std :: string的内容
已经定义了一个有用的比较函数。 OTOH，这也可能会消耗你想要的空间节省。
-
后来，
杰瑞。
宇宙是自己想象的虚构。
std::set. If you''re going to store pointers, you''ll also need to pass
a comparison function to get meaningful results -- otherwise, it''ll
attempt to compare the pointers themselves, not what they point at. The
result generally won''t be useful.
Alternatively, you might want to store something like std::string that
already defines a useful comparison function. OTOH, this might also
negate the space savings you''re trying for.
--
Later,
Jerry.
The universe is a figment of its own imagination.
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