Re: GetHeadPosition & GetNext

From:
"Heinz Ozwirk" <hozwirk.SPAM@arcor.de>
Newsgroups:
microsoft.public.vc.language
Date:
Fri, 18 Aug 2006 12:58:48 +0200
Message-ID:
<44e59d67$0$20046$9b4e6d93@newsspool4.arcor-online.net>
"Jacky Luk" <jl@knight.com> schrieb im Newsbeitrag
news:%23Fjzo2pwGHA.4872@TK2MSFTNGP02.phx.gbl...

What are the equivilence methods/functions for GetHeadPosition() and
GetNext() in MFC for the standard template library?


There are no strict equivalents, but begin() and ++ are very close. As close
as they can be with the slightly different concept to access elements in a
CList or an std::list.

While for a CList you would write something like

    POSITION p = list.GetHeadPosition();
    while (p)
    {
        ElementType& element = list.GetNext(pos);
        ...
    }

with an std::list, you could write similiar code as

    for (std::list<ElementType>::iterator it = list.begin();
        it != list.end();
        ++it)
    {
        ElementType& element = *it;
        ...
    }

You can access all STL containers using the same pattern. You only have to
keep in mind that elements in a set are const, so you have to use
ElementType const& and elements in a map are actually key-value-pairs.

HTH
    Heinz

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