howto extract last number in ansible variable

Question

I have variable, its version numbering. How I catch last number in version

example

app_ver: 1.5.0.0.20

- debug:
    var: app_ver | regex_search('^(\d+).(\d+).(\d+).(\d+).(\d+)$') | list

gives me

"app_ver |regex_search('^(\\d+).(\\d+).(\\d+).(\\d+).(\\d+)$') | list": [
        "1",
        ".",
        "5",
        ".",
        "0",
        ".",
        "0",
        ".",
        "2",
        "0"
    ]

I need last number, may be 1-figure or more

Answer 1

Split the line by . and take last element:

- debug:
    msg: "{{ app_ver.split('.')[-1] }}"