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50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
/*
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Copyright 2015 Google Inc. All rights reserved.
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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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"math/rand"
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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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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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// ShuffleStrings copies strings from the specified slice into a copy in random
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// order. It returns a new slice.
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func ShuffleStrings(s []string) []string {
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shuffled := make([]string, len(s))
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perm := rand.Perm(len(s))
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for i, j := range perm {
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shuffled[j] = s[i]
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}
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return shuffled
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}
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