Run1 scala functional abstractions

Implementing tokenization logic using functional patterns and standard library collections.From its SKILL.md

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npx -y skills add cxcscmu/SkillLearnBench --skill run1_scala-functional-abstractions

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SKILL.md

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Traits for Strategy: Define a Tokenizer base trait. Instead of complex inheritance hierarchies, prefer composition where possible, or use the Self-Type annotation if tight coupling to a configuration is required.
Collection API: Leverage Scala's Iterable and Iterator for lazy processing. Avoid mutable loops (for with var) in favor of map, flatMap, filter, and foldLeft.
Batch Processing: Implement tokenizeBatch using parallel collections (.par) or Future if the data volume requires concurrency, ensuring the code remains compliant with Scala 2.13.
Error Handling: Use Try[T] or Either[Throwable, T] to wrap potentially failing operations (like numeric parsing) instead of throwing raw exceptions.

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