A simple one: how to read a nested list into json

support
1

For example, to read from yaml front matter this list:

tags: ["a", "b"]

It works to use in index.json:

    "tags":                      
    {{- with .Params.tags -}}
      {{ delimit . ", " | jsonify }}   
    {{- else -}} 
	    "" 
    {{- end -}}

Result:

"tags":"a, b"

My attempt to read:

technologies: [["a1", "b1", "c1"], ["a2", "b2", "c2"]]

with:

   "technologies":                      
    {{- with .Params.technologies -}}
      {{range . }}
        {{ delimit . ", " }}   
      {{end}}
    {{- else -}} 
	    "" 
    {{- end -}}

Gives:

    "technologies":
        a1, b1, c1   
   
        a2, b2, c2

I would be satisfied with:

        "technologies": "a1, b1, c1, a2, b2, c2"

Wrapping in another range gave gibberish numbers between the lines.
Any hints are welcomed!

2

You have nested lists so you could using append to flatten the list and then delimit it:

 {{ with .Params.Technologies }}
    {{ $merged := slice }}
    {{ range . }}
       {{ $merged = $merged | append .}}
    {{ end }}
<!-- direct output to page -->
    "technologies": "{{ delimit $merged ", " }}"</br>
<!-- or create json string -->
   {{ $object := jsonify (dict "technologies" (delimit $merged ", ")) }}
<!-- and render it -->
   {{ highlight $object "JSON"}}
 {{end}}
1 Like
3

Neet! It worked, thank you! :+1: :+1:
I had to place “technologies” above everything:

    "technologies": 
        {{ with .Params.technologies }}
            {{ $merged := slice }}
            {{range . }}
                {{ $merged = $merged | append .}}
            {{end}}
            {{ delimit $merged ", " | jsonify}}
        {{- else -}} 
            "" 
        {{end}}

Otherwise got json parse error, when page has no “technologies” json output: "tags":"..",
So he minds the trailing comma. But this is ok: "tags":"", technologies:""

4

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