I have a binary tree as the backend for a tied hash. I'd like to be able to have it serialized with things like Data::Dumper etc., which requires the FIRSTKEY and NEXTKEY methods.

My question is: what's the best way, given these constraints?

I expect the only way is to use a stack. STaring from the root node:

  1. return a node
  2. push the left leaf on a stack and
  3. go right;
  4. when no leaves are left, pop the stack and repeat.

Is there a more efficient way?

In reply to Serializing Trees using FIRSTKEY/NEXTKEY methods? by rrwo

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