Init and reassign multiple variables at once

1

Is there any way to make the following code a bit more terse?

{{ $fallback := "fallbackVar" }}
{{ $a := "" }}
{{ $b := "" }}
{{ $c := "" }}
{{ $d := "" }}
{{ if eq .type "typevar" }}
    {{ $a = .context.Params.a }}
    {{ $b = .context.Params.b }}
    {{ $c = .context.Params.c }}
    {{ $d = .context.Params.d }}
{{ else }}
    {{ $a = $fallback }}
    {{ $b = $fallback }}
    {{ $c = $fallback }}
    {{ $d = $fallback }}
{{ end }}

I guess I am curious if one could init multiple empty vars in a single line and or reassign multiple variables to the same value in a single line or more terse way.

edit: I could assign initially assign $fallback to the vars, but I kept it this way for the purposes of the demonstration (ie. to figure out if I can assign the same value to multiple vars in a single line)

2

No, you can not.

No, you can not.

Use a map instead of individual variables? It works, but it is not as clear as your original example.

content/post/post-1.md:

+++
title = "Post 1"
date = 2020-07-18T07:25:52-04:00
draft = false
a = "foo"
b = "bar"
c = "baz"
d = "quez"
+++

layouts/_default/single.html:

{{ define "main" }}
  <h1>{{ .Title }}</h1>
  <hr>
  {{ partial "test.html" (dict "context" . "type" "typevar") }}
  <hr>
  {{ .Content }}
{{ end }}

layouts/partials/test.html:

{{- $type := .type -}}
{{- $context := .context -}}
{{- $fallback := "fallbackVar" -}}

{{- $vars := dict "a" "" "b" "" "c" "" "d" "" -}}

{{- range $k, $_ := $vars -}}
  {{- if eq $type "typevar" -}}
    {{- $vars = merge $vars (dict $k (index $context.Params $k)) -}}
  {{- else -}}
    {{- $vars = merge $vars (dict $k $fallback) -}}
  {{- end -}}
{{- end -}}

To display the result:

{{- range $k, $v := $vars -}}
  vars.{{ $k }} = {{ $v }}<br>
{{- end -}}

Result:

vars.a = foo
vars.b = bar
vars.c = baz
vars.d = quez
3

Thanks for the reply and example @jmooring. I agree that the more terse method is a bit less readable, but seeing an example of an alternative is great.