elliotchance/pie

Health v2 · maintenance only

Adoption not part of the score

2038 stars · 95 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

pie is a Go utility library providing type-safe, performant functions for common operations on slices and maps using generics. It supports both standalone parameterized functions and chainable wrappers (pie.Of, pie.OfOrdered, pie.OfNumeric) for Go 1.18+.

Use cases

• filter and map over Go slices with type safety
• chain multiple slice transformations in Go
• check if any or all slice elements match a condition
• compute average, sum, or other numeric aggregations of a slice
• deduplicate, diff, or chunk slices
• replace verbose hand-written slice loops with utility functions

When to choose

• you write lots of slice/map manipulation code in Go 1.18+
• you want generics-based type safety instead of interface{}-based libraries
• performance close to native Go loops matters

When to avoid

• you are on Go 1.17 or earlier (use pie v1 instead)
• you prefer the standard library slices package with no extra dependency
• you need complex data transformation beyond simple slice/map operations

Facets

library · maturity stable

developer-tools developer-tools go slices maps generics utility-library functional-programming type-safety algorithms

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