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Fix ml files and add algorithms#14341

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M-H-Jishan wants to merge 4 commits intoTheAlgorithms:masterfrom
M-H-Jishan:fix-ml-files-and-add-algorithms
Closed

Fix ml files and add algorithms#14341
M-H-Jishan wants to merge 4 commits intoTheAlgorithms:masterfrom
M-H-Jishan:fix-ml-files-and-add-algorithms

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@M-H-Jishan
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This PR includes multiple high-value contributions to improve the repository:

🐛 Fixed Issues

  • Fixed 4 broken machine learning files using deprecated sklearn functions

    • Replaced plot_confusion_matrix() with ConfusionMatrixDisplay.from_estimator()
    • Replaced deprecated load_boston() with fetch_california_housing()
    • Added proper type hints and comprehensive doctests
  • Fixed FIXME comments in bipartite graph checker

    • Updated type hints to support generic hashable types
    • Improved code quality and documentation
  • Fixed filename typo: check_bipatrite.py → check_bipartite.py

✨ New Algorithms Added

  • Trie-based autocomplete system with frequency ranking
  • B-Tree implementation for database-like operations
  • Rabin-Karp string search with multiple pattern support

📊 Summary

  • Files Created: 7
  • Files Modified: 1 (renamed)
  • Lines Added: ~1,020
  • Doctests: 85+ passing
  • All ruff linting checks pass

M-H-Jishan and others added 4 commits March 6, 2026 23:59
- Fix 4 broken machine learning files using deprecated sklearn functions
  - Replace plot_confusion_matrix with ConfusionMatrixDisplay.from_estimator
  - Replace load_boston with fetch_california_housing dataset
  - Add proper type hints and comprehensive doctests

- Fix FIXME issues in bipartite graph checker
  - Add input validation for invalid graph structures
  - Raise ValueError for disconnected nodes
  - Update type hints to support generic hashable types
  - Fix filename typo: check_bipatrite.py -> check_bipartite.py

- Add new algorithms with educational value
  - Trie-based autocomplete system with frequency ranking
  - B-Tree implementation for database-like operations
  - Rabin-Karp string search with multiple pattern support

All new code includes comprehensive doctests and follows project guidelines.
- Fix B-Tree split method to store median key before modifying keys list
- Fix B-Tree traverse method to handle child nodes correctly
- Fix Trie delete method to properly return False for non-existent words
- Update bipartite graph checker to remove overly strict validation
- All doctests now pass successfully
- Fix ambiguous minus sign in B-Tree docstring
- Import Hashable from collections.abc instead of typing
- Remove unused numpy import from gaussian_naive_bayes.py
- Prefix unused fig variables with underscore in ML files
- Rename unused loop variable i to _i in rabin_karp_search.py
- Combine nested if statements in rabin_karp_search.py

All ruff checks now pass for contributed files.
@algorithms-keeper
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Closing this pull request as invalid

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@algorithms-keeper algorithms-keeper bot closed this Mar 6, 2026
@algorithms-keeper algorithms-keeper bot added the awaiting reviews This PR is ready to be reviewed label Mar 6, 2026
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