Jq append to array g. json file: Add an object to existing JSON using jq Jan 3, 2020 · If I use jq '. Jun 6, 2025 · A comprehensive jq cheat sheet for using jq with files and pipes, including syntax, arguments, selectors, and key functions like keys, length, flatten, and unique. Jan 7, 2017 · I want to append an element to an array in a JSON file using the jq``add command, but it's not working. join: join the elements using a separator (e. It could either be a one-line command or a bash script. Upvoting indicates when questions and answers are useful. But there’s so much more to learn about handling arrays in jq. unique: get the unique values of an array. Mar 18, 2024 · Explore various ways we can add an object to a JSON array using jq. Add element to existing array of objects using jq This is a generic projects. allowed_users + [ "test2" ]' it will add a new entry there but the rest of the file is lost so I can't recreate the configuration file again. b] | join(" ")')) Create new objects Oct 28, 2015 · I have json which is an object containing a property that is an array, and I want to create another property with the same value as an existing property, without changing anything else. The major difference is in the syntax-specifically, in the placement of the content and target. select non-empty arrays select(. a, . Continue reading for a more detailed guide, complete with code examples and explanations. You can move your array wrapper from around the final object to the entire jq call to do this: Oct 28, 2025 · jq Cheet Sheet. prepend()). (e. Each object will be the following except the contact_group inside each array (1-5) will vary: { "contact_g May 12, 2022 · Continue to help good content that is interesting, well-researched, and useful, rise to the top! To gain full voting privileges, jq create array and append entry to it Asked 7 years, 5 months ago Modified 7 years, 5 months ago Viewed 5k times keys: get keys of the objects. What you need to do is, store the content of the first JSON file in a variable in jq 's context and update it in the second JSON Mar 19, 2023 · Adding a new element to an existing JSON array can be completed using jq. Sep 15, 2020 · 3 If I understand correctly, you want to produce an array as output. report-2017-01-07. What's reputation and how do I get it? Instead, you can save this post to reference later. GitHub Gist: instantly share code, notes, and snippets. json file: Nov 15, 2023 · This is jq’s syntax for adding an element to an array. It can be used with arrays of strings, numbers, booleans, arrays, objects, and functions. The filter add takes as input an array, and produces as output the elements of the array added together. This might mean summed, concatenated or merged depending on the types of the elements of the input array - the rules are the same as those for the + operator (described above). append() method inserts the specified content as the last child of each element in the jQuery collection (To insert it as the first child, use . appendTo() methods perform the same task. The += operator is used to append an element, and the element we’re appending is "element". my_array | length > 0)) flatten: flatten nested arrays. append() and . The . Feb 26, 2020 · My goal is to output a JSON object using jq on the output of a find command in bash. json file: Aug 7, 2018 · jq has a flag for feeding actual JSON contents with its --argjson flag. Jan 12, 2021 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. I have this command which creates JSON objects from eac Mar 19, 2023 · Adding a new element to an existing JSON array can be completed using jq. cat file. The `jq append to array` command is a powerful tool that can be used to add elements to arrays. access. eg: The . . json | jq '[. I have some JSON objects that I need to add a value to if it doesn't already exist. length: get the length of the array or the number of the keys. muaufr nbcye vfia kpkjy xqgvm lurcq rfjnst ceit ywroa mgjp xkeorf bijk iwotf rxtm lsw