Redstone Simulator Rewrite

[xoft]

Basically you need something like this (skeleton only):

for (itr = Container.begin; itr != Container.end(); )  // Note that you need to call end() each time, and you cannot auto-advance itr
{
  if (ShouldDelete)
  {
     itr = Container.erase(itr);  // Container must support erasing
  }
  else
  {
    ++itr;
  }
}