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Invert

func Invert[K, V comparable](mapInstance map[K]V) map[V]K

Invert swaps keys and values in a map. Both keys and values must be comparable types. If multiple keys have the same value, only one will remain (non-deterministic which one).

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package main

import (
    "fmt"

    "github.com/Goldziher/go-utils/maputils"
)

func main() {
    roles := map[string]int{
        "admin": 1,
        "user":  2,
        "guest": 3,
    }

    // Invert to map from ID to role name
    byID := maputils.Invert(roles)

    fmt.Printf("%v\n", byID)
    // map[1:admin 2:user 3:guest]
}