LeetCode #21: Merge Two Sorted Lists

[WazedKhan]

Summary by CodeRabbit

• New Features
  • Added support for merging two sorted linked lists into one sorted list.
  • Introduced linked-list node handling for list-based operations.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 5e0a6655-ac04-4a9e-aa46-2b93930d88f2

📥 Commits

Reviewing files that changed from the base of the PR and between 12ad8d0 and cd0680d.

📒 Files selected for processing (1)

• LeetCode/easy/merge_two_lists_21.py

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📝 Walkthrough

Walkthrough

Adds ListNode and a Solution.mergeTwoLists implementation that iteratively merges two sorted linked lists and returns the merged head.

Changes

Merge two sorted lists

Layer / File(s)	Summary
Linked-list merge implementation LeetCode/easy/merge_two_lists_21.py	Defines ListNode and implements mergeTwoLists with a dummy head, tail pointer, and leftover-list attachment.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 I hop through lists with twitchy nose,
I sort the carrots as I go in rows.
A dummy head makes merging neat,
Then leftover tails get a gentle seat.
Hooray! The linked-list bunny knows 🥕

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: implementing LeetCode #21 Merge Two Sorted Lists.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch leetcode-21-linked-list

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