Scala Collections
Scala Collections
Introduction
Scala's collections library is one of its most powerful features, providing a rich, unified API for working with sequences, sets, and maps. The library emphasizes immutability by default while offering mutable alternatives when needed for performance-critical code.
The collections hierarchy distinguishes between immutable and mutable variants, with immutable collections being the default. Key collection types include List, Vector, Set, Map, Array, and their specialized variants. The library provides consistent transformation operations across all collection types.
This skill covers immutable vs mutable collections, sequences (List, Vector, Array), sets and maps, collection operations (map, filter, fold), for-comprehensions, lazy evaluation, parallel collections, and performance characteristics.
Immutable vs Mutable Collections
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