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    Resource Orchestration Service:Fn::EachMemberIn

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    Resource Orchestration Service:Fn::EachMemberIn

    Last Updated:Mar 15, 2024

    The built-in function Fn::EachMemberIn returns true if each member in a list matches at least one member in another list, and returns false if not.

    Declaration

    • JSON

      {
  "Fn::EachMemberIn": [
    [
      value1_1,
      value1_2,
      ...
    ],
    [
      value2_1,
      value2_2,
      ...
    ]  
  ]
}

    • YAML

      • Syntax for the full function name: 

        Fn::EachMemberIn:
  - - value1_1
    - value1_2
    - ...
  - - value2_1
    - value2_2
    - ...

      • Syntax for the short form: 

        !EachMemberIn [[value1_1, value1_2, ...],[value2_1, value2_2, ...],...]

    Parameters

    • value1_1, value1_2,...: Required. This parameter specifies the first list.

    • value2_1, value2_2,...: Required. This parameter specifies the second list.

    Return value

    true or false.

    Examples

    • Fn::EachMemberIn:
  - - 1
    - 2
    - 3
  - - 1
    - 2
    - 3
    - 3
    - 4

      In this example, true is returned. 

    • Fn::EachMemberIn:
  - - 1
    - 2
    - 3
  - - 1
    - 2
    - 4

      In this example, false is returned.