hmm haven't really tested it because i just dled boost lambda_tuple in the library but if it works than somehting like

std::find_if(vec_of_some_tuples.begin(), vec_of_some_tuples.end(), boost::lambda::get<0>(boost::lambda::_1) == 5);

 

On 8/13/07, David Abrahams <dave@boost-consulting.com> wrote:

on Mon Aug 13 2007, "Graham Reitz" <graham.cpp-AT-gmail.com > wrote:

> typedef boost::tuples::tuple<int,double> some_tuple;
>
> std::vector<some_tuple> vec_of_some_tuples;
>
> // ... stuff some data into the vector
>
> // ... search for a specific int in the vector of some_tuple
>
> What would be a good method, using an stl algorithm, to search through
> the vector above to match only the int portion of the tuple (ignoring
> the double)?

Use std::find with a boost::transform_iterator over a function
returning the first member of the tuple, then extract the resulting
iterator's base() iterator.

HTH,

--
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com

The Astoria Seminar ==> http://www.astoriaseminar.com

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