{{ $result := "" }}
{{ if .Params.authors }}
    {{ $names := slice }}
    {{ range .Params.authors }}
        {{ $names = $names | append (index site.Params.authors . "name" | default .) }}
    {{ end }}
    {{ $result = delimit $names ", " }}
{{ else if .Site.Params.authors }}
    {{ $names := slice }}
    {{ range $k, $v := .Site.Params.authors }}
        {{ if eq $v.default true }}
            {{ $names = $names | append $v.name }}
        {{ end }}
    {{ end }}
    {{ $result = delimit $names ", " }}
{{ end }}
{{ return $result }}