How to Sort Strings Locale-Aware in Go with collate

Use golang.org/x/text/collate to sort strings according to locale rules instead of byte order. Create a collator for your target locale and pass it to sort.Slice with collator.Compare as the comparison function.

import (
	"sort"
	"golang.org/x/text/collate"
	"golang.org/x/text/language"
)

strings := []string{"apple", "banana", "Ångström", "Zebra"}
c := collate.New(language.English)
sort.Slice(strings, func(i, j int) bool {
	return c.CompareString(strings[i], strings[j]) < 0
})

Standard sorting compares characters by their raw computer codes, which often ignores language rules like accents or special characters. This method uses a specialized tool that understands specific languages to arrange words in the correct dictionary order. It's like using a dictionary for a specific language instead of just lining up words alphabetically by their shape.