去模板绑定常量数组值

Question

I am very new to go template; Can I know how I can bind an array with some constant values

I had tried below options; but not worked

{{ $groups := {"a", "b", "c"} }}
{{ $groups := ["a", "b", "c"] }}
{{ $groups := ("a", "b", "c") }}

Answer 1

Templates do not support composite literal syntax for arrays or slices.

You can use a custom template function that returns its variadic arguments as a slice.

Here's the function:

func slice(v ...interface{}) []interface{} {
  return v
}

Add the function to the template's map before parsing:

 template.New("").Funcs(template.FuncMap{"slice": slice}).Parse(data)

Use it like this:

  {{$groups := slice "a" "b" "c"}}

<kbd>working example on the playground</kbd>