London | 26-ITP-Jan | Kayanat Suleman | Sprint 2 | Data Groups

[KayanatSuleman]

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• 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
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Changelist

Implemented all Sprint 2 Data Groups exercises:

• Fixed object access issues in debug tasks (address, author, recipe).
• Implemented contains with validation and full test coverage.
• Implemented createLookup and added tests.
• Fixed parseQueryString to correctly handle values containing "=" and added edge case tests.
• Implemented tally with error handling and frequency counting.
• Fixed invert to correctly swap keys and values using dynamic bracket notation.
• Separated test files from implementation files for clarity.

All tests pass locally using npm test, and have used Node REPL for further testing.