mak

Documentation

Overview

Package mak helps make maps. It contains generic helpers to make/assign things, notably to maps, but also slices.

Index

• func NonNil(ptr interface{})
• func NonNilMapForJSON[K comparable, V any, M ~map[K]V](mapPtr *M)
• func NonNilSliceForJSON[T any, S ~[]T](slicePtr *S)
• func Set[K comparable, V any, T ~map[K]V](m *T, k K, v V)

Functions

func NonNil

func NonNil(ptr interface{})

NonNil takes a pointer to a Go data structure (currently only a slice or a map) and makes sure it's non-nil for JSON serialization. (In particular, JavaScript clients usually want the field to be defined after they decode the JSON.)

Deprecated: use NonNilSliceForJSON or NonNilMapForJSON instead.

func NonNilMapForJSON

func NonNilMapForJSON[K comparable, V any, M ~map[K]V](mapPtr *M)

NonNilMapForJSON makes sure that *slicePtr is non-nil so it will won't be omitted from JSON serialization and possibly confuse JavaScript clients expecting it to be present.

func NonNilSliceForJSON

func NonNilSliceForJSON[T any, S ~[]T](slicePtr *S)

NonNilSliceForJSON makes sure that *slicePtr is non-nil so it will won't be omitted from JSON serialization and possibly confuse JavaScript clients expecting it to be present.

func Set

func Set[K comparable, V any, T ~map[K]V](m *T, k K, v V)

Set populates an entry in a map, making the map if necessary.

That is, it assigns (*m)[k] = v, making *m if it was nil.