Are Multiple Iterators possible in php?
- by artvolk
Good day!
I know that C# allows multiple iterators using yield, like described here:
http://stackoverflow.com/questions/1754041/is-multiple-iterators-is-possible-in-c
In PHP there is and Iterator interface. Is it possible to implement more than one iteration scenario for a class?
More details (EDIT):
For example I have class TreeNode implementing single tree node. The whole tree can be expressed using only one this class. I want to provide iterators for iterating all direct and indirect children of current node, for example using BreadthFirst or DepthFirst order.
I can implement this Iterators as separate classes but doing so I need that tree node should expose it's children collection as public.
C# pseudocode:
public class TreeNode<T>
{
...
public IEnumerable<T> DepthFirstEnumerator
{
get
{
// Some tree traversal using 'yield return'
}
}
public IEnumerable<T> BreadthFirstEnumerator
{
get
{
// Some tree traversal using 'yield return'
}
}
}
