gnlib

README

gnlib

A miscellaneous collection of entities shared between GNA Go projects

gnver: a project version

matcher: input and output of for gnmatcher service.

reconciler: manifest, input and output for gnames reconciler service.

verifier: entities for gnames verification service.

Documentation

Index

• func ChunkChannel[T any](ctx context.Context, input <-chan T, chunkSize int) <-chan []T
• func CmpVersion(a, b string) int
• func FilterFunc[T any](s []T, f func(T) bool) []T
• func FixUtf8(s string) string
• func LangCode(lang string) string
• func LangName(code string) string
• func Map[T any, U any](s []T, f func(T) U) []U
• func SliceMap[T comparable](s []T) map[T]int

Functions

func ChunkChannel

func ChunkChannel[T any](ctx context.Context, input <-chan T, chunkSize int) <-chan []T

ChunkChannel reads from an input channel and sends slices (chunks) of up to `chunkSize` items to an output channel. If the input channel is closed, any remaining items are sent as a final slice. The output channel is closed after all data is processed.

Parameters:

• `ctx`: Context for cancellation.
• `input`: Input channel.
• `chunkSize`: Max items per chunk.

Returns:

• Output channel with slices of items.

Example:

input := make(chan int)
go func() { for i := 1; i <= 10; i++ { input <- i }; close(input) }()
chunked := ChunkChannel(context.Background(), input, 3)
for chunk := range chunked { fmt.Println(chunk) }
// Output: [1 2 3] [4 5 6] [7 8 9] [10]

func CmpVersion

func CmpVersion(a, b string) int

CmpVersion compares two semantic versions (eg v0.1.3 vs v0.2.0) as a and b. It returns 0 if the versions are equal, 1 if a is greater than b, and -1 if a is less than b. The version strings are expected to be in a format that can be split into integer components for comparison, such as "1.2.3" or "1.0.0".

func FilterFunc

func FilterFunc[T any](s []T, f func(T) bool) []T

Filter returns a new slice containing only the elements of s for which filter function returns true.

func FixUtf8

func FixUtf8(s string) string

FixUtf8 cleans a string by replacing invalid UTF-8 sequences with U+FFFD and normalizing to NFC.

func LangCode

func LangCode(lang string) string

func LangName

func LangName(code string) string

func Map

func Map[T any, U any](s []T, f func(T) U) []U

Map applies a function to each element of a slice and returns a new slice in the same order.

func SliceMap

func SliceMap[T comparable](s []T) map[T]int

SliceMap takes a slice and returns back a lookup map which allows to find index for each element of the slice. If the value happens several times in the slice, the index corresponds to the first matching element.