1472. Design Browser History (Medium)

[goungoun]

https://github.com/goungoun/leetcode/blob/main/Design/browser_history.py

1. Class Initialization
What does the init method of the BrowserHistory class do? Explain the purpose of self.history and self.curr.

2. Visit Method Functionality
Describe the functionality of the visit method. How does it manage the history and what happens to the forward history when a new URL is visited?

3. Back Method Logic
How does the back method work? Explain how it handles the situation when the number of steps to go back exceeds the available history.

4. Forward Method Mechanism
What is the role of the forward method in the BrowserHistory class? Describe how it ensures that the current index does not exceed the bounds of the history list.

5. Efficiency of History Management
Why is using a Python list advantageous for managing browser history in this implementation? Discuss the time complexity of the operations used in the visit, back, and forward methods.

6. Modifying Current Index
When you call back(2) on a history of 3 URLs currently at index 2, what will happen? Provide an example showing the history before and after the operation.

7. Overflow Handling
If forward(5) is called when currently at the last URL, what will be the output? How does the method ensure it does not go out of bounds?

8. Edge Cases
What will happen if you call back(10) when the history only contains a few entries? Illustrate this with an example.

9. Testing the Class
Write a small code snippet to initialize a BrowserHistory object and demonstrate the sequence of visits, back, and forward operations. Include edge cases in your tests.

10. Improvements and Alternatives
Suggest an improvement to the BrowserHistory class to ensure it uses a more efficient data structure for its operations. What alternatives to a list might be useful for implementation, and why?

Asked by Liner