Reverse a map in <value, key> format in Golang

I have a map for my program that looks like following:

fruit_map := map[string]string {
    "apple": "likey",
    "orange": "no likey",
}

I would like to reverse it so that it reads the following:

{
    "likey": "apple",
    "no likey": "orange",
}

There are no duplicates in values. Also, my map is small - about 200 keys. I did not find any built-in method to reverse a map like this. Is there any way to do this fast? I am not much bothered about space complexity, but the solution needs to be fast.

Thanks.

You may write a for loop to iterate over the key-value pair of original map, and put them in a new map (see function reverseMap)

Code@https://play.golang.org/p/5y1gABTpdb8

package main

import (
    "fmt"
)

func main() {
    fruit_map := map[string]string{
        "apple":  "likey",
        "orange": "no likey",
    }

    reversedMap := reverseMap(fruit_map)
    fmt.Println(reversedMap)
}

func reverseMap(m map[string]string) map[string]string {
    n := make(map[string]string, len(m))
    for k, v := range m {
        n[v] = k
    }
    return n
}

Output:

map[likey:apple no likey:orange]

BTW, it is not idiomatic to name go variable like fruit_map, you really should use camel-case, like fruitMap.