golang Format string by key.

example:

$ go get github.com/hoisie/mustache

 package main

 import (
     "github.com/hoisie/mustache"

     "bytes"
     "fmt"
     "strings"
     "text/template"
 )

 func FormatByKey(f string, m map[string]interface{}) (string, error) {
     var tpl bytes.Buffer
     t := template.Must(template.New("").Parse(f))
     if err := t.Execute(&tpl, m); err != nil {
         return f, err
     }
     return tpl.String(), nil
 }

 func main() {
     // use mustache
     m1 := map[string]interface{}{"age": "", "c": "world"}
     data := mustache.Render("hello {{c}}, I'm {{age}} years old.\n", m1)
     println(data)

     // use golang native template
     m := map[string]interface{}{"name": "John", "age": }
     s := "I'm {{.name}}, I'm {{.age}} years old.Hi {{.name}}. Your age is {{.age}}\n"
     fmt.Println(FormatByKey(s, m))

     //strings.NewReplacer
     ss := []string{"{{.name}}", "John", "{{.age}}", ""}
     r := strings.NewReplacer(ss...)
     fmt.Println(r.Replace(s))
 }

$ go run test.go

another example.

 package main

 import (
     "fmt"
     "strings"
 )

 func main() {
     Tprintf("Hello %{Name}s %{Apos}s", map[string]interface{}{"Name": "GoLang", "Apos": "!"})
 }

 func Tprintf(format string, params map[string]interface{}) {
     for key, val := range params {
         format = strings.Replace(format, "%{"+key+"}s", fmt.Sprintf("%s", val), -)
     }
     fmt.Printf(format)
 }

Named String Formatting

Golang Template is powerful