| Topic: |
DEVELOP > c-Plus-Plus |
| User: |
"vasileios zografos" |
| Date: |
20 Dec 2003 03:45:35 PM |
| Object: |
combining two stl vectors |
Hi,
I am trying to combine two stl vectors into one
so something like
std::vector<int> vector1;
std::vector<int> vector2;
std::vector<int> FullVector;
so that FullVector = vector1 + vector2
Is there any other better way than using a for loop?
V.Z.
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| User: "Ron Natalie" |
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| Title: Re: combining two stl vectors |
20 Dec 2003 03:50:41 PM |
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"vasileios zografos" <restricted@nowhere.net> wrote in message
news:bs2ftv$2tm$1@newsg4.svr.pol.co.uk...
Hi,
I am trying to combine two stl vectors into one
so something like
std::vector<int> vector1;
std::vector<int> vector2;
std::vector<int> FullVector;
so that FullVector = vector1 + vector2
FullVector.reserve(vector1.size() + vector2.size()); // Optional, tiny
performance improvement
FullVector.insert(FullVector.end(), vector1.begin(), vector1.end()); //
insert the first vector
FullVector.insert(FullVector.end(), vector2.begin(), vector2.end()); //
insert the second.
.
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| User: "vasileios zografos" |
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| Title: Re: combining two stl vectors |
20 Dec 2003 03:54:03 PM |
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Thank you
.
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| User: "Jeff Schwab" |
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| Title: Re: combining two stl vectors |
20 Dec 2003 04:07:52 PM |
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vasileios zografos wrote:
Hi,
I am trying to combine two stl vectors into one
so something like
std::vector<int> vector1;
std::vector<int> vector2;
std::vector<int> FullVector;
so that FullVector = vector1 + vector2
Is there any other better way than using a for loop?
V.Z.
#include <vector>
#include <iterator>
int main( )
{
typedef std::vector< int > V;
V vector1;
V vector2;
V fullvector;
std::back_insert_iterator< V > p( fullvector );
copy( vector1.begin( ), vector1.end( ), p );
copy( vector2.begin( ), vector2.end( ), p );
}
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