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by Ciro Santilli (@cirosantilli, 37)

jq ignore missing attribute

 ... Information technology Computer File format Data file format JSON jq
 0 By others on same topic  0 Discussions  Updated 2025-05-26  +Created 1970-01-01  See my version
echo '[{"a": 1, "b": 2}, {"b": 3}]' | jq '.[] | select(.a) | .a'
Output:
1
and no empty lines as desired.
Bibliography:
  • stackoverflow.com/questions/42097410/how-to-check-for-presence-of-key-in-jq-before-iterating-over-the-values

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