# Re: Sorted vector

From:
David Wilkinson <no-reply@effisols.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Wed, 03 Mar 2010 11:34:35 -0500
Message-ID:
<OzAbf9uuKHA.6124@TK2MSFTNGP04.phx.gbl>
Luigino wrote:

HI,

I guess I don't understand the problem then. Why not just use a vector of
vectors with these indices?
typedef std::vector<std::vector<POINT>> VecVector;

Actually it's a vector of vectors but there's a disadvantage with
it... let's assume I have 4 checkboxes where each checkbox represents
a source:

1) I select first checkbox and insert into vector_of_vectors as idx =
0;
2) I select second checkbox and insert into vector_of_vectors as idx =
1;
3) I deselect first checkbox and erase from vector_of_vectors of idx=0
position
4) I deselect second checkbox and erase from vector_of_vectors of
idx=1 position <---- here I get an Assertion Failure for right because
now the array of vectors is sized = 1 and there's no idx=1....

or even if I select second checkbox and insert into vector_of_vectors
as idx=1 (vectors_of_vector.insert(vectors_of_vector.begin()+idx,
vector) ) and it goes into assertion failure because there's no
idx=1...

Indeed having an "ordered by int" set I could have something like:

vectors_of_vector.insert(idx, vector); where it would insert for that
idx and when I need to remove it would find the idx I want and remove
it...

Luigi:

Then at any given stage, some of the indices might be missing?

Perhaps

std::map<int, std::vector<POINT>>

would work for you.

--
David Wilkinson
Visual C++ MVP

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