How to check if an array is empty in OPA Rego

Question

I have an array which declare like this- arr = []. I want to check it it's empty. I tried: count(arr)==0, is_null(arr), arr==[] and arr=="".

https://play.openpolicyagent.org/p/QZPDfOoa5A count(arr)==0 and arr==[] works fine — Aneer Geek, Apr 20 '22 at 01:03

score 2 · Answer 1 · answered Jul 18 '22 at 14:21

2

Using count would be the the idiomatic way:

arr_is_empty {
    count(arr) == 0
}

answered Jul 18 '22 at 14:21

Devoops

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How to check if an array is empty in OPA Rego

1 Answers1