Implement map function

[qinqon]

Sometimes is needed to convert one list into other, usually this is done with map function that convert each list item into different one.

For example constructing port field for all the ethernet interfaces:

Cature
ethernet-ifaces: interfaces.type==ethernet

DesiredState

without JSON

port: "{{ capture.ethernet-ifaces.interfaces -> .name }}"

with JSON (it allos to add more fields to the returned item

port: "{{ capture.ethernet-ifaces.interfaces -> { "name": .name } }}"

This should convert the list of interfaces into a list of bridge/bond ports, if more than one attribute is needed json can be used.