Re: [Boost-users] erase and iterators

From: David Klein (d.klein_at_[hidden])
Date: 2006-07-11 07:03:09

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
> 	}
> };
> 
> 
> _______________________________________________
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> Boost-users_at_[hidden]
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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