mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-24 05:50:22 +00:00
92 lines
2.4 KiB
Go
92 lines
2.4 KiB
Go
/*
|
|
Copyright 2015 The Kubernetes 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 slice provides utility methods for common operations on slices.
|
|
package slice
|
|
|
|
import (
|
|
"sort"
|
|
|
|
utilrand "k8s.io/apimachinery/pkg/util/rand"
|
|
)
|
|
|
|
// CopyStrings copies the contents of the specified string slice
|
|
// into a new slice.
|
|
func CopyStrings(s []string) []string {
|
|
if s == nil {
|
|
return nil
|
|
}
|
|
c := make([]string, len(s))
|
|
copy(c, s)
|
|
return c
|
|
}
|
|
|
|
// SortStrings sorts the specified string slice in place. It returns the same
|
|
// slice that was provided in order to facilitate method chaining.
|
|
func SortStrings(s []string) []string {
|
|
sort.Strings(s)
|
|
return s
|
|
}
|
|
|
|
// ShuffleStrings copies strings from the specified slice into a copy in random
|
|
// order. It returns a new slice.
|
|
func ShuffleStrings(s []string) []string {
|
|
if s == nil {
|
|
return nil
|
|
}
|
|
shuffled := make([]string, len(s))
|
|
perm := utilrand.Perm(len(s))
|
|
for i, j := range perm {
|
|
shuffled[j] = s[i]
|
|
}
|
|
return shuffled
|
|
}
|
|
|
|
// ContainsString checks if a given slice of strings contains the provided string.
|
|
// If a modifier func is provided, it is called with the slice item before the comparation.
|
|
func ContainsString(slice []string, s string, modifier func(s string) string) bool {
|
|
for _, item := range slice {
|
|
if item == s {
|
|
return true
|
|
}
|
|
if modifier != nil && modifier(item) == s {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// RemoveString returns a newly created []string that contains all items from slice that
|
|
// are not equal to s and modifier(s) in case modifier func is provided.
|
|
func RemoveString(slice []string, s string, modifier func(s string) string) []string {
|
|
newSlice := make([]string, 0)
|
|
for _, item := range slice {
|
|
if item == s {
|
|
continue
|
|
}
|
|
if modifier != nil && modifier(item) == s {
|
|
continue
|
|
}
|
|
newSlice = append(newSlice, item)
|
|
}
|
|
if len(newSlice) == 0 {
|
|
// Sanitize for unit tests so we don't need to distinguish empty array
|
|
// and nil.
|
|
newSlice = nil
|
|
}
|
|
return newSlice
|
|
}
|