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56 lines
1.3 KiB
56 lines
1.3 KiB
// Copyright 2017 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package strutil
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// CompareStringLists returns the strings that are present in X but not in Y.
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func CompareStringLists(X, Y []string) []string {
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m := make(map[string]bool)
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for _, y := range Y {
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m[y] = true
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}
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diff := []string{}
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for _, x := range X {
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if m[x] {
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continue
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}
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diff = append(diff, x)
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m[x] = true
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}
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return diff
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}
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// CompareStringListsInBoth returns the strings that are present in both X and Y.
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func CompareStringListsInBoth(X, Y []string) []string {
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m := make(map[string]struct{})
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for _, y := range Y {
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m[y] = struct{}{}
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}
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diff := []string{}
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for _, x := range X {
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if _, e := m[x]; e {
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diff = append(diff, x)
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delete(m, x)
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}
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}
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return diff
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}
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