Re: removing elements while looping with an index, and returnvaluesfrom Set add

[Gary Polhill]

Just for the tedious pedantry of it, I've just thought of a solution involving 
one pass through the list and no dummy list:

-(void)removeFromListUnlessCondition: (id <List>) aList {
  int n;

  for(n = [aList getCount]; n > 0; n--) {
    id elem = [aList removeFirst];

    if(condition) {
      [aList addLast: elem];
    }
  }
}

Gary



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