multiple where statements Remember that Hugo uses parameters in the range statement from the inside out. Order matters.

hugo-multiple-where-statmenets.html

{{ range first 3 (where (where .Site.Pages.ByDate.Reverse "Section" "posts") ".Title" "!=" .Title) }}

  <!-- latest posts -->
{{ end }}

sort-by-front-matter.html

   {{ range sort (where .Site.Pages "Section" "contributors")  "Params.last_name" }}

{{ $yoyo := .Title }}

 {{ if .Params.last_name }}
  <h2>title: {{ $yoyo }} |  last: {{ .Data.Prev }}</h2>
 {{ end }}
{{ end }}

template-conditionals.html

https://discuss.gohugo.io/t/confusion-regarding-template-conditionals-and-strings/2042/5

<div class="posticon">
{{ if (not (isset .Params "mdrposticon")) | or (eq .Params.mdrposticon "") }}
<img src="/icons/default.png" />
{{ else }}
<img src="{{.Params.mdrposticon }}" />
{{ end }}