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Add AmericanFlagSort algorithm #6662

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PauLopNun wants to merge 6 commits into TheAlgorithms:master
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@PauLopNun PauLopNun commented Oct 6, 2025

  • Implements American Flag Sort using bucket-based radix sort approach
  • Includes comprehensive test suite extending SortingAlgorithmTest
  • Follows project coding standards and documentation style
  • I have read CONTRIBUTING.md.
  • This pull request is all my own work -- I have not plagiarized it.
  • All filenames are in PascalCase.
  • All functions and variable names follow Java naming conventions.
  • All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
  • All new code is formatted with clang-format -i --style=file path/to/your/file.java

- Implements American Flag Sort using bucket-based radix sort approach
- Includes comprehensive test suite extending SortingAlgorithmTest
- Follows project coding standards and documentation style
- Replace radix-based approach with generic bucket partitioning
- Handle all data types: integers, floats, strings, custom objects
- Support edge cases: NaN, Infinity, empty strings, mixed values
- Use insertion sort for small arrays for better performance
- Maintains O(n log n) average case complexity
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codecov-commenter commented Oct 6, 2025
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Codecov Report

❌ Patch coverage is 97.67442% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 75.80%. Comparing base (9484c7e) to head (4c9c292).

Files with missing lines Patch % Lines
...java/com/thealgorithms/sorts/AmericanFlagSort.java 97.67% 0 Missing and 1 partial ⚠️
Additional details and impacted files
@@ Coverage Diff @@
## master #6662 +/- ##
============================================
+ Coverage 75.75% 75.80% +0.05% 
- Complexity 5772 5790 +18 
============================================
 Files 703 704 +1 
 Lines 19777 19820 +43 
 Branches 3832 3841 +9 
============================================
+ Hits 14982 15025 +43 
 Misses 4215 4215 
 Partials 580 580 

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- Remove trailing spaces from lines 16, 30, 55, 59, 70, 80
- Improve code formatting for checkstyle compliance
- Maintain same functionality and logic
- Change double spaces to single spaces before inline comments
- Lines 56-58: Adjust comment spacing to match clang-format requirements
- Maintain code readability and functionality
The CodeQL workflow failed due to a flaky BloomFilterTest, not related
to AmericanFlagSort code. This empty commit triggers a re-run.
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@DenizAltunkapan DenizAltunkapan Awaiting requested review from DenizAltunkapan DenizAltunkapan is a code owner

@yanglbme yanglbme Awaiting requested review from yanglbme yanglbme is a code owner

@alxkm alxkm Awaiting requested review from alxkm alxkm is a code owner

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