Re: CMap in CMap

Wed, 1 Apr 2015 18:40:34 -0700 (PDT)
=E5=9C=A8 2009=E5=B9=B411=E6=9C=889=E6=97=A5=E6=98=9F=E6=9C=9F=E4=B8=80 UTC=

Hi everyone,
I'm trying to "include" a CMap in another CMap, and it isn't working
very well...
Here's the faulting code:
******* IAMMetaDataCategory.h **********
#pragma once
#include "IAMMetaDataAttribute.h"
class CIAMMetaDataEvent
    CString m_name;
    CString m_resourceId;
    CMap <int, int, CIAMMetaDataAttribute, CIAMMetaDataAttribute>EvtAttribut=

******* IAMMetaDataAttribute.h **********
#pragma once
class CIAMMetaDataAttribute
    CString m_name;
    bool m_multiValued;
    CString m_transform;
    CString resourceId;
    CMap <int, int, int, int> alternateValue;
Trying to compile the above code throws the error:
c:\program files\microsoft visual studio
8\vc\atlmfc\include\afxtempl.h(1339) : error C2248: 'CObject::CObject' :=


cannot access private member declared in class 'CObject'
         c:\program files\microsoft visual studio
8\vc\atlmfc\include\afx.h(558) : see declaration of 'CObject::CObject'
         c:\program files\microsoft visual studio
8\vc\atlmfc\include\afx.h(529) : see declaration of 'CObject'
         This diagnostic occurred in the compiler generated function
Any idea of what the problem is? The problem seems to come from the
second CMap (in IAMMetaDataAttribute), but I can't figure out what's
Thanks for your help.

Title: The core of the core of the big data solutions -- Map
Author: pengwenwei
Email: pww71
Language: c++
Platform: Windows, linux
Technology: Perfect hash algorithm
Level: Advanced
Description: Map algorithm with high performance
Section MFC c++ map stl
SubSection c++ algorithm
License: (GPLv3)

    Download demo project - 1070 Kb
    Download source - 1070 Kb

For the c++ program, map is used everywhere.And bottleneck of program perfo=
rmance is often the performance of map.Especially in the case of large data=
,and the business association closely and unable to realize the data distri=
bution and parallel processing condition.So the performance of map becomes =
the key technology.

In the work experience with telecommunications industry and the information=
 security industry, I was dealing with the big bottom data,especially the m=
ost complex information security industry data,all can=E2=80=99t do without=

For example, IP table, MAC table, telephone number list, domain name resolu=
tion table, ID number table query, the Trojan horse virus characteristic co=
de of cloud killing etc..

The map of STL library using binary chop, its has the worst performance.Goo=
gle Hash map has the optimal performance and memory at present, but it has =
repeated collision probability.Now the big data rarely use a collision prob=
ability map,especially relating to fees, can=E2=80=99t be wrong.

Now I put my algorithms out here,there are three kinds of map,after the bui=
ld is Hash map.We can test the comparison,my algorithm has the zero probabi=
lity of collision,but its performance is also better than the hash algorith=
m, even its ordinary performance has no much difference with Google.

My algorithm is perfect hash algorithm,its key index and the principle of c=
ompression algorithm is out of the ordinary,the most important is a complet=
ely different structure,so the key index compression is fundamentally diff=
erent.The most direct benefit for program is that for the original map need=
 ten servers for solutions but now I only need one server.
Declare: the code can not be used for commercial purposes, if for commercia=
l applications,you can contact me with QQ 75293192.

First,modern warfare can=E2=80=99t be without the mass of information query=
, if the query of enemy target information slows down a second, it could le=
ad to the delaying fighter, leading to failure of the entire war. Informati=
on retrieval is inseparable from the map, if military products use pwwhashM=
ap instead of the traditional map,you must be the winner.

Scond,the performance of the router determines the surfing speed, just repl=
ace open source router code map for pwwHashMap, its speed can increase ten =
There are many tables to query and set in the router DHCP ptotocol,such as =
IP,Mac ,and all these are completed by map.But until now,all map are using=
 STL liabrary,its performance is very low,and using the Hash map has error =
probability,so it can only use multi router packet dispersion treatment.If =
using pwwHashMap, you can save at least ten sets of equipment.

Third,Hadoop is recognized as the big data solutions at present,and its mos=
t fundamental thing is super heavy use of the map,instead of SQL and table.=
Hadoop assumes the huge amounts of data so that the data is completely unab=
le to move, people must carry on the data analysis in the local.But as long=
 as the open source Hadoop code of the map changes into pwwHashMap, the per=
formance will increase hundredfold without any problems.

Background to this article that may be useful such as an introduction to th=
e basic ideas presented:

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