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I have an array of string in json format. I'd like to check whether it includes a specific string value.

I have tried to use contains:

echo '["aa", "bb", "cc"]' |jq '. | contains(["aa"])'
> true

it works but it also return true for a partial match:

echo '["aa", "bb", "cc"]' |jq '. | contains(["a"])'
> true

how can I find the exact match?

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You could use a regex with a word boundary:

$ echo '["aa", "bb", "cc"]' | jq -r '.[] | test(["\\baa\\b"]) | tostring | select(. == "true")'
true

$ echo '["aa", "bb", "cc"]' | jq -r '.[] | test(["\\ba\\b"]) | tostring | select(. == "true")'
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