I'm not proud of this, but it works:
|--- - name: List subtraction gather_facts: no hosts: localhost vars:
selection: [ 1, 4, 5, 7] tasks: - name: Subtract one from each selection
debug: msg: "{% set result = [] -%} {% for v in selection -%} {% set _ =
result.append(v - 1) -%} {% endfor %}{{ result }}" |
On 1/21/22 8:14 AM, Dick Visser wrote:
Hi
I have this list of ints:
selection:
- 1
- 4
- 5
- 7
I'd like to subtract 1 from each item, so that I will end up with:
selection:
- 0
- 3
- 4
- 6
I'd like to avoid adding an intermediary set_fact loop to do the math.
If I define this filter:
def subtract(number, amount=1):
return number - amount
Then I can accomplish what I want using:
selection|map('subtract')
which is reasonably clean and understandable.
But before I add a new filter - is there any other way to achieve this?
thx
--
Dick Visser
Trust & Identity Service Operations Manager
GÉANT
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