Replace \n with space in jq query/command output without tr and sed commands

Question

With input.json:

{
  "server1": {
    "name": "server1",
    "property": "ENABLED"
  },
  "server2": {
    "name": "server2",
    "property": "ENABLED"
  },
  "server3": {
    "name": "server3",
    "property": "ENABLED"
  },
}

The following jq query:

jq -r '.[] | select(.property == "ENABLED") |.name' input.json

outputs:

server1
server2
server3

I want my output to be without any new line and as below, separated by space and no space after the last word (server3 in this case)

server1 server2 server3

I don't want to do pipe after jq command and obtain the output with sed and tr commands. I want to achieve this with jq command only.

Answer 1

You're pretty close to there! In your case, the join function may help:

jq -r '[.[]|select(.property=="ENABLED")|.name]|join(" ")' input.json

By wrapping all names in an array, the join function works like that in python. From the doc:

join(str)

Joins the array of elements given as input, using the argument as separator. It is the inverse of split: that is, running split("foo") | join("foo") over any input string returns said input string.

jq ´join(", ")´
   ["a","b,c,d","e"]
=> "a, b,c,d, e"