Resource Orchestration Service:Fn::Join

Declaration

• JSON

  {
    "Fn::Join": [
      "delimiter",
      [
        "toJoinString1",
        "toJoinString2",
        ...
      ]
    ]
   }

• YAML

  • Syntax for the full function name:

    Fn::Join:
     - delimiter
     - - toJoinstring1
       - toJoinstring2
       - ...

  • Syntax for the short form:

    !Join [delimiter, [toJoinstring1, toJoinstring2, ...]]

Parameters

• delimiter: the delimiter used to separate the combined values. If empty, values are combined without a delimiter.

• toJoinString1, toJoinString2, ...: the list of strings to combine.

Return value

The combined string.

Examples

!Join [',', [a,b,c]]

{
  "Fn::Join": [
    ",",
    ["a", "b", "c"]
  ]
}

Return value: a,b,c.

Supported functions

• Fn::Base64Encode

• Fn::GetAtt

• Fn::Join

• Fn::Select

• Fn::Select