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stringset.go
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/
stringset.go
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// Copyright 2017 Jeff Foley. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package stringset
import (
"sync"
)
type StringSet struct {
sync.Mutex
Set map[string]struct{}
}
func NewStringSet() *StringSet {
return &StringSet{Set: make(map[string]struct{})}
}
func (ss *StringSet) Add(s string) {
ss.Lock()
defer ss.Unlock()
ss.Set[s] = struct{}{}
}
func (ss *StringSet) AddAll(s []string) {
for _, v := range s {
ss.Add(v)
}
}
func (ss *StringSet) Contains(s string) bool {
ss.Lock()
defer ss.Unlock()
_, found := ss.Set[s]
return found
}
func (ss *StringSet) ContainsAny(s []string) bool {
for _, v := range s {
if ss.Contains(v) {
return true
}
}
return false
}
func (ss *StringSet) ContainsAll(s []string) bool {
for _, v := range s {
if !ss.Contains(v) {
return false
}
}
return true
}
func (ss *StringSet) ToStrings() []string {
var result []string
ss.Lock()
defer ss.Unlock()
for k := range ss.Set {
result = append(result, k)
}
return result
}
func (ss *StringSet) Equal(second *StringSet) bool {
return ss.ContainsAll(second.ToStrings())
}
func (ss *StringSet) Empty() bool {
if len(ss.ToStrings()) == 0 {
return true
}
return false
}