| // Copyright 2019 The LUCI Authors. |
| // |
| // 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 common |
| |
| import "sort" |
| |
| // MergeStrings merges multiple string slices together into a single slice, |
| // removing duplicates. |
| func MergeStrings(sss ...[]string) []string { |
| result := []string{} |
| seen := map[string]bool{} |
| for _, ss := range sss { |
| for _, s := range ss { |
| if seen[s] { |
| continue |
| } |
| seen[s] = true |
| result = append(result, s) |
| } |
| } |
| sort.Strings(result) |
| return result |
| } |
