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set.go
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46 lines (36 loc) · 724 Bytes
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package main
import (
)
type Set struct {
data map[string]struct{}
}
func NewSet() *Set {
s := &Set{data: make(map[string]struct{}),}
return s
}
func (s *Set) Add(element string) {
s.data[element] = struct{}{}
}
func (s *Set) Remove(element string) {
delete(s.data, element)
}
func (s *Set) Contains(element string) bool {
_, exists := s.data[element]
return exists
}
func (s *Set) Size() int {
return len(s.data)
}
// func main() {
// s := NewSet()
// s.Add("password")
// s.Add("password")
// s.Add("password")
// s.Add("id")
//
// fmt.Println(s, s.Contains("password"))
//
// s.Remove("password")
//
// fmt.Println(s, s.Contains("password"))
// }