Nested lists in yaml

Question

How can I create nested lists in YAML? I want to get:

 {\"Hello\": [\"as\", [\"http://\", [\"cat\"]]]}

Here\'s my YAML that doesn\'t work (

Answer 1

And the answer is:

URL:
  Description: URL of the website
  Value:
    "Fn::Join":
      - ""
      - - "http://"
        - "Fn::GetAtt":
            - ElasticLoadBalancer
            - DNSName

(see http://pyyaml.org/wiki/PyYAMLDocumentation#YAMLsyntax - "block sequences can be nested")

Answer 2

Try:

Hello: 
  ["as", 
    ["http://", 
      [cat]
    ]
]

Json output:

{
  "Hello": [
    "as", 
    [
      "http://", 
      [
        "cat"
      ]
    ]
  ]
}

Answer 3

start nested list from a new line. using this approach it is easy to figure out.

Read this and this articles. They have a lot of examples.

try like this:

YAML

Value:
    "Fn::Join":
      - ""
      -
         - "http://"
         - "Fn::GetAtt":
              - ElasticLoadBalancer
              - DNSName

Equivalent JSON

{
  "URL": {
    "Description": "URL of the website",
    "Value": {
      "Fn::Join": [
        "",
        [
          "http://",
          {
            "Fn::GetAtt": [
              "ElasticLoadBalancer",
              "DNSName"
            ]
          }
        ]
      ]
    }
  }
}