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|
package entities
import (
"strings"
)
type StringSet struct {
m map[string]struct{}
}
func NewStringSet(elem ...string) *StringSet {
s := &StringSet{}
s.m = make(map[string]struct{}, len(elem))
for _, e := range elem {
s.Add(e)
}
return s
}
func (s *StringSet) Add(elem string) {
s.m[elem] = struct{}{}
}
func (s *StringSet) Remove(elem string) {
delete(s.m, elem)
}
func (s *StringSet) Contains(elem string) bool {
_, ok := s.m[elem]
return ok
}
func (s *StringSet) Elements() []string {
keys := make([]string, len(s.m))
i := 0
for k := range s.m {
keys[i] = k
i++
}
return keys
}
func (s *StringSet) String() string {
return strings.Join(s.Elements(), ", ")
}
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