Template tricks

template.go

package main

import (
	"bytes"
	"fmt"
	"text/template"
)

func WithMap(format string, m map[string]string) (string, error) {
	tpl, err := template.New("format").Parse(format)
	if err != nil {
		return "", err
	}
	var buf bytes.Buffer
	err = tpl.Execute(&buf, m)
	if err != nil {
		return "", err
	}
	return buf.String(), nil

}

func main() {
	m := map[string]string{
		"data": "world",
		"end":  "!",
	}
	f, err := WithMap("Hello {{.data}}{{.end}}", m)
	if err != nil {
		panic(err)
	}
	fmt.Println(f)
}