In Go, you can create a bidirectional map using two separate maps for each direction of the mapping. Here is an example of how you can implement it:
type BidirectionalMap struct {
forwardMap map[string]string
reverseMap map[string]string
}
func (b *BidirectionalMap) Add(key1, key2 string) {
b.forwardMap[key1] = key2
b.reverseMap[key2] = key1
}
func (b *BidirectionalMap) Get(key string) (string, bool) {
value, exists := b.forwardMap[key]
return value, exists
}
func (b *BidirectionalMap) ReverseGet(key string) (string, bool) {
value, exists := b.reverseMap[key]
return value, exists
}
func main() {
bidirectionalMap := BidirectionalMap{
forwardMap: make(map[string]string),
reverseMap: make(map[string]string),
}
bidirectionalMap.Add("key1", "value1")
bidirectionalMap.Add("key2", "value2")
value, exists := bidirectionalMap.Get("key1") // Get value based on key
fmt.Println(value, exists) // Output: value1 true
key, exists := bidirectionalMap.ReverseGet("value2") // Reverse get key based on value
fmt.Println(key, exists) // Output: key2 true
}
In this example, the BidirectionalMap struct holds two maps: forwardMap and reverseMap. The Add method adds a mapping from key1 to key2 in both maps. The Get method retrieves the value based on a key from the forward mapping, and the ReverseGet method retrieves the key based on a value from the reverse mapping.
By using two separate maps, you can achieve bidirectional mapping in Go.