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sets.go
60 lines (50 loc) · 1.16 KB
/
sets.go
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/**
* Copyright 2020 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
package sets
import (
"sort"
)
type StringSet map[string]bool
func NewStringSet(strs ...string) StringSet {
ss := StringSet{}
for _, s := range strs {
ss.Add(s)
}
return ss
}
func (s StringSet) Add(k string) {
s[k] = true
}
func (s StringSet) Merge(st StringSet) {
for k := range st {
s.Add(k)
}
}
func (s StringSet) Slice() []string {
sl := []string{}
for k := range s {
sl = append(sl, k)
}
return sl
}
func (s StringSet) Sorted() []string {
sl := s.Slice()
sort.Strings(sl)
return sl
}
func (s StringSet) Contains(k string) bool {
_, ok := s[k]
return ok
}