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range.go
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/
range.go
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package txttmpl
import (
"bytes"
"text/template"
"github.com/devlights/gomy/output"
)
// Range -- text/template の テンプレート仕様 におけるrangeのサンプルです.
//
// # REFERENCES
// - https://pkg.go.dev/text/template@latest
// - https://stackoverflow.com/questions/54156119/range-over-string-slice-in-golang-template
func Range() error {
const (
t1 = `{{range .Items}} {{.}} {{end}}`
t2 = `{{range $elem := .Items}} {{$elem}} {{end}}`
t3 = `{{range $i,$elem := .Items}} {{$i}}:{{$elem}} {{end}}`
)
type (
D struct {
Items []string
}
)
for _, t := range []string{t1, t2, t3} {
var (
tmpl *template.Template
buf bytes.Buffer
err error
)
output.Stdoutl("[template]", t)
tmpl, err = template.New("Range").Parse(t)
if err != nil {
return err
}
err = tmpl.Execute(&buf, D{[]string{"hello", "world"}})
if err != nil {
return err
}
output.Stdoutf("[tmpl]", "%q\n", buf.String())
output.StdoutHr()
}
return nil
}