# Language of the Month for September 2021: jq

In accordance with our meta agreement, since one candidate received more votes than the others, we have a new featured language! Throughout September 2021, our Language of the Month will be:

# jq

## What's a Language of the Month?

See the meta post for nominations. In short, during September, those who wish to participate should learn jq, and use it to solve challenges.

jq is a lightweight practical language for querying JSON files. It's like sed for JSON files.

• Streams in jq can be very powerful. Operators see individual items in strings when applied:
range(4) -> 0, 1, 2, 3
range(4) + 2 -> 1, 2, 3, 4

# Sometimes, a cartesian-product-like output can be produced with

range(2) + range(4) -> 0,1, 1,2, 2,3, 3,4

• Piping - Outputs of the previous expression can be piped.
3 | .+2  #  -> 5

[3, 4, 5] | max   # -> 5

• Compact syntax
[1, 2, 3] | map( . + 1 ) # -> [2, 3, 4]

# (This could also be achieved as [1, 2, 3][]|.+1)


## Bounty

I (Emanresu A, or whatever I end up changing my name to) will award a +50 bounty for any user's first jq answer posted during this month. A user doesn't qualify if they have posted a jq answer before.

I will only award this bounty on questions which I haven't answered, because I have to award +100 or more on questions which I have. If the question you answered has been answered by me as well, provide another jq answer and I'll happily bounty that.

## Resources

• Your last example can be golfed even further with 1,2,3|.+1! Try it online Sep 2 at 5:32
• range(4)+2 should be 2,3,4,5 Sep 8 at 9:59
• is there going to be a jq chat room? Sep 9 at 11:34
• @Wezl There is now! Sep 9 at 16:39
• Well, there was, but nobody used it. :( Sep 23 at 20:47

# List of all jq solutions posted in September 2021

First-time answerers highlighted in bold, bounty requests in italic. For bounty requests, I can't award it if I've bountied the question already or answered it already.

# List of all jq tips posted in September 2021

• add entries in the form:

  [<tip title>](https://codegolf.stackexchange.com/a/<answer-ID>) by [username](https://codegolf.stackexchange.com/users/<user-ID>)


# List of jq-related challenges posted in September 2021

• add entries in the form:

  [<challenge title>](https://codegolf.stackexchange.com/q/<question-ID>) by [username](https://codegolf.stackexchange.com/users/<user-ID>)