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- // Copyright 2014 The go-ethereum Authors
- // This file is part of the go-ethereum library.
- //
- // The go-ethereum library is free software: you can redistribute it and/or modify
- // it under the terms of the GNU Lesser General Public License as published by
- // the Free Software Foundation, either version 3 of the License, or
- // (at your option) any later version.
- //
- // The go-ethereum library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU Lesser General Public License for more details.
- //
- // You should have received a copy of the GNU Lesser General Public License
- // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
- package common
- // ContainsAll returns true if all elements in one of the targets are in the source,
- // false otherwise.
- func ContainsAll(source []string, targets ...[]string) bool {
- mark := make(map[string]bool, len(source))
- for _, str := range source {
- mark[str] = true
- }
- for _, target := range targets {
- foundAll := true
- for _, str := range target {
- if _, found := mark[str]; !found {
- foundAll = false
- break
- }
- }
- if foundAll {
- return true
- }
- }
- return false
- }
- // AppendSkipDuplicates appends source with elements with a condition
- // that those elemments must NOT already exist in the source
- func AppendSkipDuplicates(slice []string, elems ...string) (result []string) {
- mark := make(map[string]bool, len(slice))
- for _, val := range slice {
- mark[val] = true
- }
- result = slice
- for _, val := range elems {
- if _, ok := mark[val]; !ok {
- result = append(result, val)
- }
- }
- return result
- }
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