mirror of https://github.com/k3s-io/k3s
76 lines
2.1 KiB
Go
76 lines
2.1 KiB
Go
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/*
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Copyright 2015 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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// Package slice provides utility methods for common operations on slices.
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package slice
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import (
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"sort"
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)
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// CopyStrings copies the contents of the specified string slice
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// into a new slice.
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func CopyStrings(s []string) []string {
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if s == nil {
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return nil
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}
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c := make([]string, len(s))
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copy(c, s)
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return c
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}
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// SortStrings sorts the specified string slice in place. It returns the same
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// slice that was provided in order to facilitate method chaining.
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func SortStrings(s []string) []string {
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sort.Strings(s)
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return s
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}
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// ContainsString checks if a given slice of strings contains the provided string.
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// If a modifier func is provided, it is called with the slice item before the comparation.
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func ContainsString(slice []string, s string, modifier func(s string) string) bool {
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for _, item := range slice {
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if item == s {
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return true
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}
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if modifier != nil && modifier(item) == s {
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return true
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}
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}
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return false
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}
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// RemoveString returns a newly created []string that contains all items from slice that
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// are not equal to s and modifier(s) in case modifier func is provided.
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func RemoveString(slice []string, s string, modifier func(s string) string) []string {
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newSlice := make([]string, 0)
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for _, item := range slice {
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if item == s {
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continue
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}
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if modifier != nil && modifier(item) == s {
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continue
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}
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newSlice = append(newSlice, item)
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}
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if len(newSlice) == 0 {
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// Sanitize for unit tests so we don't need to distinguish empty array
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// and nil.
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newSlice = nil
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}
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return newSlice
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}
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