codibre

Master @codibre/fluent-iterable for elegant, functional data transformations. Use this skill whenever working with iterables, async iterables, streams, arrays, or collections in TypeScript/NestJS code. Perfect for: filtering/mapping/reducing large datasets, streaming database results, chunking data for batch operations, parallel async processing, complex transformations with flatMap, deduplication with toSet(), lookup maps with toMap(). Know when to use fluent() vs fluentAsync(), and avoid common pitfalls like premature materialization or wrong iterable type.

High-performance nested Maps & Sets for JS — value-based array keys with NestedMap/NestedSet and getOrSet to eliminate string-concat keys and manual caching/grouping boilerplate