jq length of array code example

Example 1: jq count outputs

echo '[{"username":"user1"},{"username":"user2"}]' | jq '. | length'
> 2

Example 2: jq select

$ jq '.[] | select(.location=="Stockholm")' json
{
  "location": "Stockholm",
  "name": "Walt"
}
{
  "location": "Stockholm",
  "name": "Donald"
}

Example 3: jq list top nodes

echo '{"node1":"foo", "node2":"bar","node3": {"inner-node": "baz"}}' | jq '. |=keys'

[
  "node1",
  "node2",
  "node3"
]