Source: internal.go in package golang.org/x/text/internal

Source File
	internal.go

Belonging Package
	golang.org/x/text/internal

Package internal contains non-exported functionality that are used by packages in the text repository.

package internal // import "golang.org/x/text/internal"

import (
	"sort"

	"golang.org/x/text/language"
)

SortTags sorts tags in place.

func SortTags(tags []language.Tag) {
	sort.Sort(sorter(tags))
}

type sorter []language.Tag

func (s sorter) Len() int {
	return len(s)
}

func (s sorter) Swap(i, j int) {
	s[i], s[j] = s[j], s[i]
}

func (s sorter) Less(i, j int) bool {
	return s[i].String() < s[j].String()
}

UniqueTags sorts and filters duplicate tags in place and returns a slice with only unique tags.

func UniqueTags(tags []language.Tag) []language.Tag {
	if len(tags) <= 1 {
		return tags
	}
	SortTags(tags)
	k := 0
	for i := 1; i < len(tags); i++ {
		if tags[k].String() < tags[i].String() {
			k++
			tags[k] = tags[i]
		}
	}
	return tags[:k+1]


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