Extract json values as array with jq in bash

Question

How to extract json's values as JSON array with jq?

For example for the below json:

{
   "a" : 1,
   "b" : 2
}

I would like to extract values as JSON array:

[ 1, 2 ]

How to do it with jq? I found a way to extract keys only in the docs:

echo $json | jq keys returns:

[
"a",
"b"
]

The keys a, b, need to be double quoted for jq to parse it as a valid JSON — Inian
– Inian, Commented Dec 26, 2019 at 16:46
Do you mean as a JSON array, or as a Bash array, or just the values, one per line? — tripleee
– tripleee, Commented Dec 26, 2019 at 16:46

peak · Accepted Answer · 2019-12-26 18:10:46Z

5

echo $json | jq '[.[]]'

output:

[
  1,
  2
]

peak

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answered Dec 26, 2019 at 16:57

gregory

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Comments

axiac · Accepted Answer · 2019-12-26 16:55:10Z

3

One solution is to use to_entries then map to extract only the values:

$ echo '{
   "a" : 1,
   "b" : 2
}' | jq 'to_entries|map(.value)'
[
  1,
  2
]

Another solution, simpler and faster, is to use just map(.):

$ echo '{
   "a" : 1,
   "b" : 2
}' | jq 'map(.)'
[
  1,
  2
]

answered Dec 26, 2019 at 16:55

axiac

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