concatenate json objects with jq

Question

I am new with jq and I have these json output of an app:

{ "Woonkamer": { "currentTemperature": 21.8, "battery": 75, "isFailed": false } } { "Hal": { "currentTemperature": 19.5, "battery": 48, "isFailed": false } } { "Bijkeuken": { "currentTemperature": 18.4, "battery": 56, "isFailed": false } }

I want them to join to one json object like:

{ "Woonkamer": { "currentTemperature": 21.8, "battery": 75, "isFailed": false }, "Hal": { "currentTemperature": 19.5, "battery": 48, "isFailed": false }, "Bijkeuken": { "currentTemperature": 18.4, "battery": 56, "isFailed": false } }

I cannot get figured out how to do that with jq (I read the manual),

Can someone help me?

How big is the JSON?

Inian
– Inian

2021-03-11 18:09:48 +00:00
Commented Mar 11, 2021 at 18:09 — Inian
– Inian, Commented Mar 11, 2021 at 18:09
@Inian It is about 1000 characters

kc27
– kc27

2021-03-11 20:32:27 +00:00
Commented Mar 11, 2021 at 20:32 — kc27
– kc27, Commented Mar 11, 2021 at 20:32

0stone0 · Accepted Answer · 2021-03-11 20:36:20Z

Use jq's add, this will concatenate all the input objects;

// Multiple variables holding objects jq -s add <<< "$j1 $j2 $j3" // Multiple files holding objects jq -s add file1 file2 file3 // Command output with multiple columns command | jq -s add

Manually

You can add multiple columns by hand like so;

jq -s '.[0] * .[1] * .[2]' file1 file2 file3

Result

Both options result in:

{ "Woonkamer": { "currentTemperature": 21.8, "battery": 75, "isFailed": false }, "Hal": { "currentTemperature": 19.5, "battery": 48, "isFailed": false }, "Bijkeuken": { "currentTemperature": 18.4, "battery": 56, "isFailed": false } }

Your answer worked for me. I piped the result to the following jq command: code | jq -s '.[0] * .[1] * .[2]'

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