Quick Summary
- Design a class that defers array transformations until a search query is executed.
- Support method chaining via map by creating new immutable instances with accumulated transformation pipelines.
- Execute the pipeline on demand during indexOf to find the first matching transformed value.
What This Tests
- Deferred execution and lazy evaluation patterns
- Immutability and functional state management
- Method chaining and fluent interface design
- Memory optimization by avoiding intermediate data structures
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