Re: [Boost-users] [Bind] Is this how to write it?

Subject: Re: [Boost-users] [Bind] Is this how to write it?
From: Ovanes Markarian (om_boost_at_[hidden])
Date: 2010-03-23 08:22:25

Just in case you interested how to accomplish it with boost::lambda

#include "boost/lambda/lambda.hpp"

#include <algorithm>
#include <vector>
#include <iterator>
#include <iostream>

using namespace std;
using namespace boost;
namespace bll=boost::lambda;

int main( )
{
  vector< int > v;
  int i=0;
  // generate vector values
  generate_n(back_inserter(v), 100, ++bll::var(i));

  //create the output iterator
  ostream_iterator<int> oiter(cout, ",");
  copy(v.begin(), v.end(), oiter);
  cout << endl;

  // double each value in the vector
  for_each(v.begin(), v.end(), bll::_1*=2);
  copy(v.begin(), v.end(), oiter);
  cout << endl;

  return 0;
}

Regards,
Ovanes

On Tue, Mar 23, 2010 at 10:49 AM, Robert Jones <robertgbjones_at_[hidden]>wrote:

> #include <algorithm>
> #include <vector>
> #include "boost/bind.hpp"
>
> struct A
> {
>     int double_it( int i ) { return i * 2; }
> } a;
>
> std::vector< int > v;
>
> int main( )
> {
>     for ( std::vector< int >::iterator i = v.begin( ); i != v.end( ); ++ i
> )
>     {
>         a.double_it( * i );
>     }
>
>     // Write it as a for_each/bind
>     std::for_each( v.begin(), v.end(), boost::bind( & A::double_it,
> boost::ref( a ), _1 ) );
> }
>
>