golang-samber-lo

Functional transforms in Go slices use type-safe helpers for Map, Filter, and Reduce to replace manual loops with declarative operations. This approach returns new collections, ensuring safe concurrent reads while reducing boilerplate code.

Grouping and aggregating Go structs is best handled by type-safe functional helpers like GroupBy. These helpers enable declarative data-processing pipelines, allowing you to group records and apply transforms across slices without error-prone manual iteration.

The samber/lo library supports lazy iterators to eliminate intermediate allocations in long pipelines. Introduced for Go 1.23+, iterators allow efficient, deferred execution of functional collection transforms across slices and channels.

Functional collection helpers provide mutable in-place variants specifically for performance-sensitive Go hot paths. These allocation-conscious functions modify collections directly rather than returning new instances, optimizing CPU-bound workloads.

Parallel collection transforms require Go 1.18+ for core generics support, while lazy iterators need Go 1.23+ and experimental SIMD numeric operations require Go 1.25+. These versions enable type-safe, concurrent functional helpers for performance-oriented workloads.

You should avoid immutable collection transforms in Go when operating within allocation-sensitive hot paths or processing extremely large datasets. In these cases, mutable in-place variants or lazy iterators are preferred to prevent memory pressure from intermediate allocations.