Remove particles using ofRemove

parts.cpp

class Particle {
public:
	Particle() {
		alive = (int)ofRandom(0,5);
	}
	bool operator()(const Particle& p) {
		return p.alive;
	}
	int alive;
};

//-----------------
// create some particles.
for(int i = 0; i < 10; ++i) {
	Particle p;
	parts.push_back(p);
}

ofRemove(parts, Particle::Particle());

cout << "We have:" << parts.size() << " particles." << endl;