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slices.go
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/
slices.go
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// Copyright 2021 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.
package util
// CombineUniqueInt64 combines two ordered int64 slices and returns
// the result without duplicates.
func CombineUniqueInt64(a []int64, b []int64) []int64 {
res := make([]int64, 0, len(a))
aIter, bIter := 0, 0
for aIter < len(a) && bIter < len(b) {
if a[aIter] == b[bIter] {
res = append(res, a[aIter])
aIter++
bIter++
} else if a[aIter] < b[bIter] {
res = append(res, a[aIter])
aIter++
} else {
res = append(res, b[bIter])
bIter++
}
}
if aIter < len(a) {
res = append(res, a[aIter:]...)
}
if bIter < len(b) {
res = append(res, b[bIter:]...)
}
return res
}
// CombineUniqueString combines two ordered string slices and returns
// the result without duplicates.
func CombineUniqueString(a []string, b []string) []string {
res := make([]string, 0, len(a))
aIter, bIter := 0, 0
for aIter < len(a) && bIter < len(b) {
if a[aIter] == b[bIter] {
res = append(res, a[aIter])
aIter++
bIter++
} else if a[aIter] < b[bIter] {
res = append(res, a[aIter])
aIter++
} else {
res = append(res, b[bIter])
bIter++
}
}
if aIter < len(a) {
res = append(res, a[aIter:]...)
}
if bIter < len(b) {
res = append(res, b[bIter:]...)
}
return res
}