gtsocial-umbx

Unnamed repository; edit this file 'description' to name the repository.
Log | Files | Refs | README | LICENSE

internal.go (1040B)

      1 // Copyright 2015 The Go Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style
      3 // license that can be found in the LICENSE file.
      4 
      5 // Package internal contains non-exported functionality that are used by
      6 // packages in the text repository.
      7 package internal // import "golang.org/x/text/internal"
      8 
      9 import (
     10 	"sort"
     11 
     12 	"golang.org/x/text/language"
     13 )
     14 
     15 // SortTags sorts tags in place.
     16 func SortTags(tags []language.Tag) {
     17 	sort.Sort(sorter(tags))
     18 }
     19 
     20 type sorter []language.Tag
     21 
     22 func (s sorter) Len() int {
     23 	return len(s)
     24 }
     25 
     26 func (s sorter) Swap(i, j int) {
     27 	s[i], s[j] = s[j], s[i]
     28 }
     29 
     30 func (s sorter) Less(i, j int) bool {
     31 	return s[i].String() < s[j].String()
     32 }
     33 
     34 // UniqueTags sorts and filters duplicate tags in place and returns a slice with
     35 // only unique tags.
     36 func UniqueTags(tags []language.Tag) []language.Tag {
     37 	if len(tags) <= 1 {
     38 		return tags
     39 	}
     40 	SortTags(tags)
     41 	k := 0
     42 	for i := 1; i < len(tags); i++ {
     43 		if tags[k].String() < tags[i].String() {
     44 			k++
     45 			tags[k] = tags[i]
     46 		}
     47 	}
     48 	return tags[:k+1]
     49 }