How can I print an arbitrary string with JQ?

Question

I'd like to print with JQ arbitrary composed strings.

Suppose I have a json document* as follow:

[{
  "first_name": "Angela",
  "last_name": "Sleney",
  "email": "[email protected]"
}, {
  "first_name": "Clint",
  "last_name": "Ducroe",
  "email": "[email protected]"
}, {
  "first_name": "Aurthur",
  "last_name": "Tebb",
  "email": "[email protected]"
}]

and with data from above let's say just for example (could be any string) I'd like to print with JQ 3 lines as follow:

Email address for user Angela Sleney is "[email protected]"
Email address for user Clint Ducroe is "[email protected]"
Email address for user Aurthur Tebb is "[email protected]"

How can I do this?

Best I was able to do was to print the data 1 per line with:

jq -r '.[] | .first_name, .last_name, .email, ""'

But result was

Angela
Sleney
[email protected]

Clint
Ducroe
[email protected]

Aurthur
Tebb
[email protected]

*NB: the data comes from random generator, no real names or emails.

Possible duplicate: https://stackoverflow.com/questions/40396445/get-outputs-from-jq-on-a-single-line — JohnnyJS, Jan 01 '20 at 09:26

score 9 · Accepted Answer · edited Jan 02 '20 at 01:14

9

I tried playing around with your json on jqplay.

I got the desired result -

Email address for user Angela Sleney is "[email protected]"
Email address for user Clint Ducroe is "[email protected]"
Email address for user Aurthur Tebb is "[email protected]"

with this filter -

.[] | "Email address for user \(.first_name) \(.last_name) is \"\(.email)\""

Play around with the string interpolation \(foo) to get your result.

edited Jan 02 '20 at 01:14

Gruber

2,196
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answered Jan 01 '20 at 09:28

Rohit Mishra

151
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1

The way you have the single quotes written isn't necessary, you could use them as is: `'\(.email)'` though double quotes seem to be preferred: `\"\(.email)\"` – Jeff Mercado Jan 01 '20 at 09:37
I knew it I was missing a simple feature, I was very surprised that a common request as mine wasn't addressed somehow by the program. RTFM strikes back, totally missed it in the documentation. Thank you! – Gruber Jan 01 '20 at 21:29

score 0 · Answer 2 · edited Jun 20 '20 at 09:12

Try this:

jq -r '.[] | .first_name + " " + .last_name + " " + .email'

Addition: +

The operator + takes two filters:

Applies them both to the same input

Adds the results together.

The term “adding” here has a different meaning depending on the types involved:

Numbers are added by normal arithmetic.

Arrays are added by concatenating each other forming a larger array.

Strings are added by appending one with another to form a larger string.

Refer here for more details:

Source: https://stedolan.github.io/jq/manual/#Builtinoperatorsandfunctions

How can I print an arbitrary string with JQ?

2 Answers2