Basic variable scope with array transformations

The with command creates an isolated scope. Array operations performed inside are not visible outside.

• automation
• output

• 
  start:
    set:
      message@text:
        {% set numbers = range(1, 5) %}
        Outside scope numbers are: {{numbers|join(',')}}
        {% with %}
        {% set doubled = numbers|map(n => n * 2) %}
        Inside scope doubled numbers are: {{doubled|join(',')}}
        {% endwith %}
        Doubled numbers are not visible here anymore
    return:
      output@key: message
  
  

• 
  __return:
    output: |-
      Outside scope numbers are: 1,2,3,4,5
      Inside scope doubled numbers are: 2,4,6,8,10
      Doubled numbers are not visible here anymore
  
  

Using variable mapping

Pass variables directly in the with command using a mapping.

• automation
• output

• 
  start:
    set:
      message@text:
        {% set numbers = range(1, 5) %}
        {% with {tripled: numbers|map(n => n * 3)} %}
        Inside mapping scope tripled numbers are: {{tripled|join(',')}}
        {% endwith %}
    return:
      output@key: message
  
  

• 
  __return:
    output: |
      Inside mapping scope tripled numbers are: 3,6,9,12,15
  
  

Using only to restrict outer scope

The with command creates an isolated scope. Array operations performed inside are not visible outside.

• automation
• output

• 
  start:
    set:
      message@text:
        {% set outer = 'I am not visible' %}
        {% with {inner: 'I am visible'} only %}
        With only: {{inner}}, outer value is not accessible.
        {% endwith %}
    return:
      output@key: message
  
  

• 
  __return:
    output: |
      With only: I am visible, outer value is not accessible.
  
  

Basic variable scope with isolation

The with command creates an isolated scope. Variables defined inside are not visible in the outer scope.

• automation
• output

• 
  start:
    set:
      message@text:
        {% with %}
        {% set name = 'Kina' -%}
        Hi, {{name}}!
        {% endwith %}
        {% if name is empty %}
        Where did you go?
        {% endif %}
    return:
      output@key: message
  
  

• 
  __return:
    output: |
      Hi, Kina!
      Where did you go?