Click here to Skip to main content
11,705,453 members (32,961 online)
Click here to Skip to main content

Extend collections

, 11 Dec 1999 76K 1.5K 24
Rate this:
Please Sign up or sign in to vote.
Extended Collection classes to provide copy, compare and find operations with 2 dimensional arrays and maps
  • Download demo project - 24 Kb
  • Download source files - 10 Kb
  • Sample Image - ExtCol.gif

    <!-- Article Starts --> This article describes three enhanced collection template classes, CArrayEx, CMapEx and CSortedArray. CArrayEx and CMapEx each provide an assignment operator and class copy constructor that allow us to easily craft two dimensional arrays and mappings. In addition, CMapEx provides the ability to map CStrings, by providing a template hash function. CSortedArray is a dynamic array template class that provides "sort after insertion" functionality.
    // example of 2 dimensional array
    typedef CArrayEx<int,int> CIntArray;
    CArrayEx<CIntArray, CIntArray &> a2D;
    CIntArray aInt;
    
    a2D.Add (aInt);
    

    In a lot of cases we need an array with a find function. We can use a sorted array for this.

    To work with arrays of pointers you should use the functions DestructElements, CopyElements as described in the MSDN article 'Collections: How to Make a Type-Safe Collection'], but there exists an alternative way by using auto_ptr:

    // auto_ptr example.
    CArray<auto_ptr<CValue>,auto_ptr<CValue> > a;
    CArray<auto_ptr<CValue>,auto_ptr<CValue> > b;
    
    TRACE(_T("Create\n"));
    
    a.Add(auto_ptr<CValue>(new CValue(1)));
    a.Add(auto_ptr<CValue>(new CMyValue(2)));
    
    b.Add(auto_ptr<CValue>(new CValue(3)));
    b.Add(auto_ptr<CValue>(new CMyValue(4)));
    
    // TRACE(_T("Copy\n"));
    // a.Copy(b);
    
    TRACE(_T("Append\n"));
    a.Append(b);
    
    TRACE(_T("Remove all\n"));
    b.RemoveAll();
    

    The classes provided with this article are as follows:

    CArrayEx
    Adds Copy constructor, assign operator and Array compare operators
    CMapEx
    Adds Copy constructor, assign operator and a method "GetAt" by index. Also adds Hash functions for CString
    CListEx
    Adds Copy constructor and assign operator
    CSortedArray
    Adds Copy constructor, assign operator and Array compare operators. Also adds Sorting methods by operators or compare functions

    License

    This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

    A list of licenses authors might use can be found here

    Share

    About the Author

    Audrius Vasiliauskas
    Business Analyst
    Lithuania Lithuania
    No Biography provided

    You may also be interested in...

    Comments and Discussions

     
    GeneralLicense Rights Pin
    John McNeill2-Dec-10 6:31
    memberJohn McNeill2-Dec-10 6:31 
    GeneralRe: License Rights Pin
    Audrius Vasiliauskas2-Dec-10 7:15
    memberAudrius Vasiliauskas2-Dec-10 7:15 
    GeneralRe: License Rights Pin
    John McNeill2-Dec-10 7:17
    memberJohn McNeill2-Dec-10 7:17 
    Generallicense Pin
    yhing24-Aug-09 6:51
    memberyhing24-Aug-09 6:51 
    GeneralRe: license Pin
    Audrius Vasiliauskas24-Aug-09 21:56
    memberAudrius Vasiliauskas24-Aug-09 21:56 
    GeneralProblem with unicode Pin
    bitkidoku13-Dec-06 2:04
    memberbitkidoku13-Dec-06 2:04 
    This classes does not work with _UNICODE setting Frown | :(

    (or does it?)
    GeneralVC 7.1 error C2679 Pin
    HobbitCoder25-Oct-05 13:50
    memberHobbitCoder25-Oct-05 13:50 
    General.NET Pin
    davedrums7-Sep-04 4:01
    memberdavedrums7-Sep-04 4:01 
    GeneralRe: .NET Pin
    Audrius Vasiliauskas13-Sep-04 0:37
    memberAudrius Vasiliauskas13-Sep-04 0:37 
    GeneralRemoveAt Pin
    PhilTordoff18-Mar-03 4:12
    memberPhilTordoff18-Mar-03 4:12 
    GeneralRe: RemoveAt Pin
    Audrius Vasiliauskas18-Mar-03 4:28
    memberAudrius Vasiliauskas18-Mar-03 4:28 
    QuestionSetSize missing? Pin
    Anonymous9-May-01 2:20
    memberAnonymous9-May-01 2:20 

    General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

    Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

    | Advertise | Privacy | Terms of Use | Mobile
    Web04 | 2.8.150819.1 | Last Updated 12 Dec 1999
    Article Copyright 1999 by Audrius Vasiliauskas
    Everything else Copyright © CodeProject, 1999-2015
    Layout: fixed | fluid