Implement Manual String Reversal Function Without Built-in Methods

[momstrosity]

Implement Manual String Reversal Function Without Built-in Methods

Description

Task

Implement String Reversal Function

Acceptance Criteria

• Function should take a string input and return its reverse
• Should handle empty strings
• Should preserve spaces and special characters
• Should be implemented without using string[::-1] or reverse()

Summary of Work

Overview

This pull request implements a custom string reversal function that meets the following key requirements:

• Reverses a string without using built-in reversal methods like [::-1] or reverse()
• Handles various input scenarios
• Provides robust error handling

Changes Made

• Implemented reverse_string() function in src/string_reversal.py
• Used a two-pointer technique for manual string reversal
• Maintained comprehensive test coverage

Implementation Details

Approach

• Convert input string to a list of characters
• Use two pointers (left and right) to swap characters
• Iterate until pointers meet in the middle
• Convert modified list back to a string

Key Features

• O(n) time complexity
• In-place character swapping
• Type checking for input validation
• Handles edge cases like:
  • Empty strings
  • Single characters
  • Strings with special characters
  • Unicode strings

Testing

• All existing test cases pass
• Verified functionality across multiple input types
• Comprehensive test suite covers:
  • Normal string reversal
  • Empty string handling
  • Special character support
  • Unicode character support
  • Invalid input type detection

Acceptance Criteria

✅ Implemented without using [::-1] or reverse()
✅ Handles various input scenarios
✅ Provides error handling for invalid inputs
✅ Passes all existing test cases

Performance Considerations

• Linear time complexity O(n)
• Minimal additional space usage
• Efficient character swapping approach

Notes

• Implementation uses manual character swapping
• Maintains readability and performance

Changes Made

• Implemented manual string reversal in src/string_reversal.py
• Used two-pointer technique for in-place character swapping
• Maintained comprehensive error handling
• Preserved existing test coverage

Tests

• Verify string reversal for various input types
• Confirm error handling for invalid inputs
• Ensure no built-in reversal methods are used
• Check performance and time complexity

Signatures

Staking Key

BiYiK5ioyqd6c2pPvvjaSzLAhR8MMvBordhBnh9CordT: 2kzzh6Zv2eii53h8ZEzRWFXDwY6zRrygGTwr6ucXd5cqBFGNUtb4vNtt1jE8TRcStJuJAStiT2iwU184hnhDnjKzDshTHeNaTMjjFz6q5gReqbVyru3AiqPNE48CVeD7M9ussWPiyXbxsRQj2iCao1PnDtViciV3zLE2TnuhG5iiSSFsTF7SMKGwCbB5QN8Qpw1kxsxmz9YbNhcqW2hBwEWR5ABqakuuSHRaYpfe8wUJpD2CvMKwRQJsnh3rot1SazFbXDxNh9S6E9PgyU4MrnxWQDXC3QybFpZzApPHsjJZHCRQNbaCuDBDubH3SjQJSpKbg4ALejNRP9C9NWS6gDWediC8KWDg6LQd78LXEuowbuPeeVysugAp9zk

Public Key

7rnv8Gvvs8tbnnnddjozHRXqtmrMpW536PJRDxV4ua4t: 3TLtADV2dUmNYG2qhVnCfQBDroukx5vA6VXefLuEcPGBfvSnpbANtYujsmCm3ehQpbCg17kTeKNtQPnERLCNSx2a5J721H9gwhQgBmVwfdVzYiMKXRvFWrkQwKYQjxfbY1269tGyz5LM6nPdiEQmt1MVhoFHSTWyp1vPSByyaqAUisVT34uYdHgdeHEwcenqrhsSuEmcshKYXjh2R5DoqvTXbr3tqk8SbxNhit9xNNmGMyMkXaAo6Shh6ghuUudycvEqFihhPnoaTEnucQujmuBMhxkutQct4Ugmsj6SuBLJMjB5opRTgF8vopHLP3zZU1ntVBJdrMR7PQq2s2mtmNqNf6a86PFk34eEq2LzUXXbvYhZJnFGQJMfye