# jq

* piping jq to less with colour:

`jq -C . data.json |less -R`


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* piping streaming output to jq:

`(echo 'asdf {"type":"stats"}'; sleep 1 ) | cut -f 2 -d ' ' | jq --unbuffered .`


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* loop over dict and get list of item keys which match a pattern:

```
kubectl get secret secretname -n namespace -o json \
  | jq -r '.metadata.annotations | with_entries(select(.key|match("certmanager.k8s.io")))' \
  | jq -r '. | keys[]'
```