Why Go
- Case Studies
  
  Common problems companies solve with Go
- Use Cases
  
  Stories about how and why companies use Go
- Security
  
  How Go can help keep you secure by default
Learn
Docs
- Effective Go
  
  Tips for writing clear, performant, and idiomatic Go code
- Go User Manual
  
  A complete introduction to building software with Go
- Standard library
  
  Reference documentation for Go's standard library
- Release Notes
  
  Learn what's new in each Go release
- API
  
  Reference documentation for the pkg.go.dev API
Packages
Community
- Recorded Talks
  
  Videos from prior events
- Meetups
  
  Meet other local Go developers
- Conferences
  
  Learn and network with Go developers from around the world
- Go blog
  
  The Go project's official blog.
- Go project
  
  Get help and stay informed from Go
- Get connected

filter

package module

Go to main page

Versions in this module

v0

v0.6.1

May 25, 2026

v0.6.0

Jan 22, 2026

v0.5.0

Jun 16, 2025

Changes in this version

+ func And[T any](filters ...func(T) bool) func(T) bool

+ func NotAnd[T any](filters ...func(T) bool) func(T) bool

+ func NotOr[T any](filters ...func(T) bool) func(T) bool

+ func Or[T any](filters ...func(T) bool) func(T) bool

v0.4.1

Mar 19, 2024

Changes in this version

+ var DefaultRNG = rand.New(rand.NewSource(time.Now().UnixNano()))

+ var ErrNoElement = errors.New("no element")

+ var ErrTooManyElements = errors.New("too many elements")

+ func Equals[T comparable](v T) func(T) bool

+ func FilterMapAnd[K comparable, V any](m map[K]V, filters ...func(V) bool) map[K]V

+ func FilterMapNotAnd[K comparable, V any](m map[K]V, filters ...func(V) bool) map[K]V

+ func FilterMapNotOr[K comparable, V any](m map[K]V, filters ...func(V) bool) map[K]V

+ func FilterMapOr[K comparable, V any](m map[K]V, filters ...func(V) bool) map[K]V

+ func FilterMap[K comparable, V any](m map[K]V, filter func(V) bool) map[K]V

+ func FilterSliceAnd[T any](l []T, filters ...func(T) bool) []T

+ func FilterSliceNotAnd[T any](l []T, filters ...func(T) bool) []T

+ func FilterSliceNotOr[T any](l []T, filters ...func(T) bool) []T

+ func FilterSliceOr[T any](l []T, filters ...func(T) bool) []T

+ func FilterSlice[T any](l []T, filter func(T) bool) []T

+ func OneOnly[T any](l []T) (*T, error)

+ func SliceSelectFirst[T any](l []T) *T

+ func SliceSelectLast[T any](l []T) *T

+ func SliceSelectRandomWithGenerator[T any](l []T, generator func(int) int) *T

+ func SliceSelectRandom[T any](l []T) *T

+ func SliceToAndFilter[T any, U any](list []T, filterFunc func(T) func(U) bool) func(U) bool

+ func SliceToOrFilter[T any, U any](list []T, filterFunc func(T) func(U) bool) func(U) bool

v0.4.0

Oct 20, 2023

v0.3.0

Jul 11, 2023

v0.2.0

Jun 6, 2023

v0.1.0

May 21, 2023