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Speed up/reduce allocations by using strings.Map #8

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Speed up/reduce allocations by using strings.Map #8

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31 changes: 17 additions & 14 deletions main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -7,23 +7,26 @@
// are unique, that responsibility falls on the caller.
package sanitized_anchor_name // import "github.com/shurcooL/sanitized_anchor_name"

import "unicode"
import (
"strings"
"unicode"
)

// Create returns a sanitized anchor name for the given text.
func Create(text string) string {
var anchorName []rune
var futureDash = false
for _, r := range text {
switch {
case unicode.IsLetter(r) || unicode.IsNumber(r):
if futureDash && len(anchorName) > 0 {
anchorName = append(anchorName, '-')
}
futureDash = false
anchorName = append(anchorName, unicode.ToLower(r))
default:
futureDash = true
var hasRunes bool
var prevDash bool
fn := func(r rune) rune {
if unicode.IsLetter(r) || unicode.IsNumber(r) {
hasRunes = true
prevDash = false
return unicode.ToLower(r)
}
if hasRunes && !prevDash {
prevDash = true
return '-'
}
return -1
}
return string(anchorName)
return strings.TrimRight(strings.Map(fn, text), "-")
}