Using OR condition in OPA rego

I want to use an OR operation to combine the following conditions:

• the count of my arr is not equal to 0
• my email does not contain "test.com"

Currently I am using the built-in function any():

any([count(arr) != 0, not contains(email, "test.com")])

However my rule is producing an error.

How can I achieve and improve this in one line?

The not keyword is a bit of a special case in that it can't be used inside of many contexts such as the array of your example. I believe this could be improved in OPA, but until then you can trivially avoid it for at most cases, like the one you provided:

any([count(arr) != 0, contains(email, "test.com") == false])