CMap class questions [Solved]

[econy]

I use a CmapStringToString object, put over 10000 key-value pairs into the object. But I use: test1 = mStrMap.GetCount(); test2 = mStrMap.GetHashTableSize(); try to get the map size. test1 = 0x00000299 test2 = 0x00000011 I wonder what the meaning of GetCount(), and GetHashTableSize();

[CPallini]

With the following code

CMapStringToString mss;
//mss.InitHashTable(32767);

for (int i=0; i<10000; ++i)
{
CString k,v;
k.Format("%05d", i);
v.Format("Foo%02d", i%100);
mss[k] = v;
}
int count = mss.GetCount();
int hsize = mss.GetHashTableSize();

I get: count = 10000 hsize = 17 I don't know what exactly GetHashTableSize returns, the documentation is not much detailed about.

Veni, vidi, vici.

[Lost User]

See http://msdn.microsoft.com/en-us/library/9ah6bd2h.aspx[^] for details about the hash table size. Are you certain you added 1000 items?

[econy]

My fault, checked again, GetCount() works well for me too.

[econy]

Sorry, my fault, checked again, GetCount() return value is right. but don't know what is the meaning of GetHashTableSize();

[econy]

Determines the number of elements in the hash table for the map. // msdn: GetHashTableSize(); Retrieves the number of elements in the map. //msdn: GetCount() And I read some articles, they say Hashmap is equivalent to Hashtable. So, what is the difference between GetCount() and GetHashSize() confused me

[Lost User]

That's why I gave you a link to the MSDN page that explains it.

[Lost User]

econy wrote:

So, what is the difference between GetCount() and GetHashSize()

GetCount returns the number of elements in the Map, e.g. 1000. GetHashSize gives the size of the Hash table that is used to manage the Map; in most cases this information is not useful to you.