How to print the value of a key containing dots

Question

I\'m trying to print the values of a map, whose keys have a dot (.) on it.

Example map:

type TemplateData struct {
    Data map[string] int
         


        

Answer 1

No you can't. According to the specs in http://golang.org/pkg/text/template/#Arguments, the key must be alphanumeric

- The name of a key of the data, which must be a map, preceded
  by a period, such as
    .Key
  The result is the map element value indexed by the key.
  Key invocations may be chained and combined with fields to any
  depth:
    .Field1.Key1.Field2.Key2
  Although the key must be an alphanumeric identifier, unlike with
  field names they do not need to start with an upper case letter.
  Keys can also be evaluated on variables, including chaining:
    $x.key1.key2

You can still print it by iterating over the Map package main

import (
    "fmt"
    "html/template"
    "os"
)

type TemplateData struct {
    Data map[string]int
}

func main() {
    data := TemplateData{map[string]int{"core.value": 1, "test": 100}}

    t, err := template.New("foo").Parse(`{{range $key, $value := .Data}}
   {{$key}}: {{$value}}
{{end}}`)
    if err != nil {
        fmt.Println(err)
    }
    err = t.Execute(os.Stdout, data)
    if err != nil {
        fmt.Println(err)
    }
}

http://play.golang.org/p/6xB_7WQ-59