In Go, you can implement a set using a map by using the keys of the map to represent the unique values of the set. Here's an example implementation:
package main
import (
"fmt"
)
type Set struct {
data map[int]bool
}
func NewSet() *Set {
return &Set{
data: make(map[int]bool),
}
}
func (s *Set) Add(value int) {
s.data[value] = true
}
func (s *Set) Remove(value int) {
delete(s.data, value)
}
func (s *Set) Contains(value int) bool {
_, exists := s.data[value]
return exists
}
func (s *Set) Size() int {
return len(s.data)
}
func (s *Set) Values() []int {
values := make([]int, 0, len(s.data))
for value := range s.data {
values = append(values, value)
}
return values
}
func main() {
set := NewSet()
set.Add(1)
set.Add(2)
set.Add(3)
set.Remove(2)
fmt.Println(set.Contains(1)) // Output: true
fmt.Println(set.Contains(2)) // Output: false
fmt.Println(set.Size()) // Output: 2
fmt.Println(set.Values()) // Output: [1 3]
}
In this example, the Set struct contains a map called data where the keys represent the unique values of the set. The methods Add, Remove, Contains, Size, and Values provide the necessary operations to manipulate and query the set.
Note that the above implementation assumes you are working with integers as values. You can modify the data type in the map and the relevant methods to work with other types as needed.