6
votes
1answer
101 views

Functional, but not recursive, tree traversal

To learn tree traversal i implemented os.walk, tail-recursive and stack-based. Unfortunately Python doesn't support tail call optimization. How do i rewrite my ...
4
votes
2answers
109 views

Retrieve min from stack in O(1)

I wrote some Python code to solve the following problem. I'm curious to see if someone else can find a better solution, or critique my solution. How would you design a stack which, in addition to ...