forked from Consensys/quorum
/
slice.go
54 lines (50 loc) · 1.74 KB
/
slice.go
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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 the target are in the source,
// false otherwise.
func ContainsAll(source, target []string) bool {
mark := make(map[string]bool, len(source))
for _, str := range source {
mark[str] = true
}
for _, str := range target {
if _, found := mark[str]; !found {
return false
}
}
return true
}
// ContainsAll returns true if all elements in the target are NOT in the source,
// false otherwise.
func NotContainsAll(source, target []string) bool {
return !ContainsAll(source, target)
}
// 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
}