Sheffield | 26-ITP-jan | Richard Frimpong | Sprint 2 | Data Groups

[Richiealx]

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Self checklist

• I have titled my PR with Region | Cohort | FirstName LastName | Sprint | Assignment Title
• My changes meet the requirements of the task
• I have tested my changes
• My changes follow the style guide

Changelist

This pull request contains my completed work for Sprint 2 - Data Groups.

Debug

• Fixed address.js (correct object property access)
• Fixed author.js (correct object iteration)
• Fixed recipe.js (proper formatting of output)

Implement

• Implemented contains using own-property checking (avoids inherited properties)
• Implemented createLookup to convert key-value pairs into an object
• Implemented tally using Object.create(null) to handle edge cases like "toString"
• Improved parseQueryString to:
  • handle values containing "="
  • handle missing values and keys
  • ignore trailing "&"
  • decode URL-encoded keys and values

Interpret

• Analysed and explained the issue in invert.js
• Fixed implementation using bracket notation
• Added tests to verify correctness

Stretch

• Implemented countWords with:
  • punctuation handling
  • case normalisation
  • whitespace handling
  • safe object creation to handle words like "constructor"
• Refactored calculateMode into smaller helper functions:
  • frequency tracking
  • mode selection

Testing

• All tests pass successfully
• 7 test suites and 27 tests passing