gistfile1.j

@implementation CPArray (MoveIndexes)

- (void)moveIndexes:(CPIndexSet)indexes toIndex:(int)insertIndex
{
    var aboveCount = 0,
        object,
        removeIndex;
	
	var index = [indexes lastIndex];
	
    while (index != CPNotFound)
	{
		if (index >= insertIndex)
		{
			removeIndex = index + aboveCount;
			aboveCount ++;
		}
		else
		{
			removeIndex = index;
			insertIndex --;
		}
		
		object = [self objectAtIndex:removeIndex];
		[self removeObjectAtIndex:removeIndex];
		[self insertObject:object atIndex:insertIndex];
		
		index = [indexes indexLessThanIndex:index];
	}
}

@end