Impala Documentation

std::set<int> Impala::Util::RandomUniqueNumbers	(	int	count,
		int	upperBound
	)

get 'count' numbers in the range [0,upperBound)

Definition at line 71 of file Random.h.

References ILOG_ERROR, ILOG_VAR, and RandomInt().

Referenced by GetNSamples().

00072 {
00073     ILOG_VAR(Impala.Util.Random.RandomUniqueNumbers);
00074     std::set<int> set;
00075     if(count > upperBound)
00076     {
00077         ILOG_ERROR("count > upperBound:"<< count <<" "<< upperBound);
00078         return set;
00079     }
00080     if(count > RAND_MAX)
00081     {
00082         ILOG_ERROR("count > RAND_MAX:"<< count <<" "<< RAND_MAX);
00083         return set;
00084     }
00085     while(set.size() < count)
00086     {
00087         int draw = RandomInt(upperBound);
00088         if(set.find(draw) == set.end())
00089             set.insert(draw);
00090     }
00091     return set;
00092 }

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