woodpecker/shared/utils/slices.go
2023-08-09 09:00:12 +02:00

59 lines
1.5 KiB
Go

// Copyright 2023 Woodpecker 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 utils
// MergeSlices return a new slice that combines all values of input slices
// TODO: once https://github.com/golang/go/pull/61817 got merged, we should switch to it
func MergeSlices[T any](slices ...[]T) []T {
sl := 0
for i := range slices {
sl += len(slices[i])
}
result := make([]T, sl)
cp := 0
for _, s := range slices {
if sLen := len(s); sLen != 0 {
copy(result[cp:], s)
cp += sLen
}
}
return result
}
// EqualSliceValues compare two slices if they have equal values independent of how they are sorted
func EqualSliceValues[E comparable](s1, s2 []E) bool {
if len(s1) != len(s2) {
return false
}
m1 := sliceToCountMap(s1)
m2 := sliceToCountMap(s2)
for k, v := range m1 {
if m2[k] != v {
return false
}
}
return true
}
func sliceToCountMap[E comparable](list []E) map[E]int {
m := make(map[E]int)
for i := range list {
m[list[i]]++
}
return m
}