Re: [Boost-users] erase and iterators

From: bringiton bringiton (kneeride_at_[hidden])
Date: 2006-07-11 07:11:41

On 7/11/06, David Klein <d.klein_at_[hidden]> wrote:
> boost-users-bounces_at_[hidden] wrote:
> > On Tue, Jul 11, 2006 at 10:19:05AM +0000, Roman Neuhauser wrote:
> >> # kneeride_at_[hidden] / 2006-07-11 17:31:23 +1000:
> >>> On 7/11/06, Michael Nicolella <boost_at_[hidden]> wrote:
> >>>> vec.erase( std::remove_if( vec.begin(), vec.end(),
> >>>> some_condition_functor
> >>>> )  );
> >>>
> >>> Mike, I do like your remove_if example.
> >>>
> >>> i am not familar with this approach, can you please give me an
> >>> example of defining a some_condition_functor? for example when the
> >>> value == 5.
> >
> > What about this?
> >
> > Let's assume the vector contains ints
> >
> > class condition_functor {
> >
> > public:
> >
> >       bool operator()(int elem)
> >       {
> >        return elem==5
> >       }
> > };
> >
> >
> > _______________________________________________
> > Boost-users mailing list
> > Boost-users_at_[hidden]
> > http://lists.boost.org/mailman/listinfo.cgi/boost-users
>
> you can use Boost.Lambda for this
>
> #include <boost/lambda/lambda.hpp>
>
> using namespace boost::lambda;
>
> std::vector<int> v;
> ...
> v.erase(std::remove_if(v.begin(), v.end(), 5 == _1));
>
> --
> HTH dave
> _______________________________________________
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> Boost-users_at_[hidden]
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>

maybe i'm old school but i don't like those crazy constructs. i like a
mix between OO and functional. **i'm even still getting used to the
erase(remove_if()) syntax ;)