Azure pipeline nested parameter index

Question

How do I get the x element of a nested Azure DevOps pipeline parameter?

parameters:
 - name: environment
   type: object
   default:
     development:
       description: Development env
       vaults:
         Vault-1: Vault-1-Connection
         Vault-2: Vault-2-Connection
  

In my case I want to get the key and the value of the first element in the vaults sub-object.

This doesn't work:

${{ each env in parameters.environment }}:
  ${{ env.vaults[0].key }}
  ${{ env.vaults[0].value }}

Answer 1

Please use the code as below to get the key and value of the first element in vaults sub-object. Please note: Vault-1 seems is unexpected symbol while parsing pipeline YAML, thus I replace it with Vault1.

steps:
- script: echo ${{parameters.environment.development.vaults.Vault1}}   # echo nested object value

        
- ${{ each pair in parameters.environment.development.vaults }}:       # echo nested object key and value
  - ${{ if eq(pair.key,'Vault1')}}:
    - script: echo "${{ pair.key }}, ${{ pair.value }}"