CODEWITHSUNDEEP
templatesgorange
Martin Probst
Martin Probst

Reputation: 9641

Go Templates: looping over index

I want to render a simple pagination list in a Go html/template. Go templates only support for loops over ranges ({{range x}}{{.}}{{end}}) - I only have a simple int. Is there a more elegant way than creating a fake slice, map, or chan of the right size? All of that seems a bit heavy handed just for outputting something N times.

Upvotes: 3

Views: 813

Answers (1)

Sebastian
Sebastian

Reputation: 17413

You can register a function which produces a slice:

package main

import (
  "os"
  "text/template"
)

func main() {

    funcMap := template.FuncMap{
      "slice": func(i int) []int { return make([]int, i) },
    }

    tmpl := `{{$x := .}}{{range slice 10}}<p>{{$x}}</p>{{end}}`
    t, _ := template.New("template").Funcs(funcMap).Parse(tmpl)
    t.Execute(os.Stdout, "42")

}

Check it in playground

Upvotes: 3

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