slice

Documentation

Index

• func Map[T, U any](s []T, f func(T) U) []U
• func MapError[T, U any](s []T, f func(T) (U, error)) ([]U, error)
• func Prealloc[T any](capacity int) []T

Functions

func Map

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

Map applies the given function to each element of the given slice and returns a new slice with the results.

func MapError

func MapError[T, U any](s []T, f func(T) (U, error)) ([]U, error)

MapError applies the given function to each element of the given slice and returns a new slice with the results. If any element returns an error that error is returned, as well as the slice of results so far.

func Prealloc

func Prealloc[T any](capacity int) []T

Preallocates a slice of type T of a given length. If the input length is 0 then the returned slice will be nil. We prefer this over `make([]T, 0, length)` because nil is often treated semantically different from an empty slice.