gistfile1.txt

package main

import "fmt"

func checkMap(m map[interface{}]interface{}, listName, value string) bool {
	_list, ok := m[listName]
	if !ok {
		return false
	}

	list, ok := _list.([]interface{})
	if !ok {
		return false
	}

	for _, listItem := range list {
		if str, ok := listItem.(string); ok {
			if str == value {
				return true
			}
		}
	}

	return false
}

func main() {

	sampleMap := map[interface{}]interface{}{
		"some-string": []interface{}{"value1", "value2"},
	}

	fmt.Println(checkMap(sampleMap, "some-string", "value1")) // true
	fmt.Println(checkMap(sampleMap, "some-string", "bogus"))  // false
	fmt.Println(checkMap(sampleMap, "bogus", "value1"))       // false

}