if width > 1 {
		// It's a valid encoding. Width cannot be one for a correctly encoded
		// non-ASCII rune.
		return width, data[0:width], nil
	}

	// We know it's an error: we have width==1 and implicitly r==utf8.RuneError.
	// Is the error because there wasn't a full rune to be decoded?
	// FullRune distinguishes correctly between erroneous and incomplete encodings.
	if !atEOF && !utf8.FullRune(data) {

	fmt.Println(bytes.LastIndexFunc([]byte("go gopher!"), unicode.IsNumber))
	// Output:
	// 8
	// 9
	// -1
}

func ExampleMap() {
	rot13 := func(r rune) rune {
		switch {
		case r >= 'A' && r <= 'Z':
			return 'A' + (r-'A'+13)%26
		case r >= 'a' && r <= 'z':
			return 'a' + (r-'a'+13)%26
		}
		return r
	}

	testenv    *envtest.Environment
	testClient client.Client

	allNamespacedGVKs = append(helmreconciler.NamespacedResources(),
		schema.GroupVersionKind{Group: "", Version: "v1", Kind: "Endpoints"})
	// CRDs are not in the prune list, but must be considered for tests.
	allClusterGVKs = helmreconciler.ClusterResources
)

func init() {
	if kubeBuilderInstalled() {

			AllowQuotedRecordDelimiter: false,
			unmarshaled:                true,
		})

		for {
			record, err = r.Read(record)
			if err != nil {
				break
			}
			opts := sql.WriteCSVOpts{
				FieldDelimiter: []rune(c.fieldDelimiter)[0],
				Quote:          '"',
				QuoteEscape:    '"',
				AlwaysQuote:    false,
			}
			record.WriteCSV(&result, opts)
			result.Truncate(result.Len() - 1)
			result.WriteString(c.recordDelimiter)

		Short: "Open Prometheus web UI",
		Long:  `Open Istio's Prometheus dashboard`,
		Example: `  istioctl dashboard prometheus

  # with short syntax
  istioctl dash prometheus
  istioctl d prometheus`,
		RunE: func(cmd *cobra.Command, args []string) error {
			client, err := ctx.CLIClientWithRevision(opts.Revision)
			if err != nil {
				return fmt.Errorf("failed to create k8s client: %v", err)
			}

		return err
	} else if match {
		return nil
	}

	// normalize the name to letters, digits, _ or $
	valid := true
	cleaned := strings.Map(func(r rune) rune {
		switch {
		case unicode.IsLetter(r):
			return 'a'
		case unicode.IsDigit(r):
			return '0'
		case r == '_', r == '$':
			return r
		default:
			valid = false
			return -1
		}

	fixture.ipsetDeps.On("addIP",
		"foo-v4",
		netip.MustParseAddr("2.2.2.2"),
		ipProto,
		podUID,
		true,
	).Return(nil)

	// List should return one IP not in our "pod snapshot", which means we prune
	fixture.ipsetDeps.On("listEntriesByIP",
		"foo-v4",
	).Return([]netip.Addr{
		netip.MustParseAddr("2.2.2.2"),
		netip.MustParseAddr("6.6.6.6"),
		netip.MustParseAddr("3.3.3.3"),
	}, nil)

hasUnicode:
	s = s[i:]
	t = t[i:]
	for len(s) != 0 && len(t) != 0 {
		// Extract first rune from each.
		var sr, tr rune
		if s[0] < utf8.RuneSelf {
			sr, s = rune(s[0]), s[1:]
		} else {
			r, size := utf8.DecodeRune(s)
			sr, s = r, s[size:]
		}
		if t[0] < utf8.RuneSelf {
			tr, t = rune(t[0]), t[1:]
		} else {
			r, size := utf8.DecodeRune(t)
			tr, t = r, t[size:]
		}

  istioctl x ztunnel-config certificates <ztunnel-name[.namespace]> -o json
`,
		Aliases: []string{"certificates", "certs", "cert"},
		Args:    common.validateArgs,
		RunE: runConfigDump(ctx, common, func(cw *ztunnelDump.ConfigWriter) error {
			switch common.outputFormat {
			case summaryOutput:
				return cw.PrintSecretSummary()
			case jsonOutput, yamlOutput:

// a canonical form. Practically this means that we convert any punctuation to
// dashes, which is how the UID is represented within Kubernetes.
func canonicalizePodUID(uid string) types.UID {
	return types.UID(strings.Map(func(r rune) rune {
		if unicode.IsPunct(r) {
			r = '-'
		}
		return r
	}, uid))
}

// Cgroup represents a linux cgroup.
type Cgroup struct {
	HierarchyID    string
	ControllerList string