Not sure how to force a for_each with a lambda to invoke the random function object successively. In the for_each version below get_long is called just once. Not sure how to use var, std_function, bind or something else to overcome this. I'm sure the answer is straight forward... anyone? Regards, Matt. #include <iostream> #include <boost/random.hpp> #include <vector> #include <boost/lambda/lambda.hpp> #include <boost/lambda/bind.hpp> typedef boost::mt19937 base_generator_type; base_generator_type generator( 100123u ); boost::uniform_int<base_generator_type,long> gen_long(generator,-100,100); using namespace std; using namespace boost::lambda; int main(int argc, char *argv[]) { vector<long> v(10); for_each(v.begin(),v.end(), _1 = gen_long() ); for_each(v.begin(), v.end(), cout << _1 << ' '); cout << "\n"; for( vector<>::iterator i = v.begin(); i != v.end(); ++i ) { *i = gen_long(); } for_each(v.begin(), v.end(), cout << _1 << ' '); cout << "\n"; system("PAUSE"); return 0; }