Скачать или смотреть How to Easily Modify Each Element of an Array in jq

Discover simple methods to modify each element of an array in jq. Learn how to enhance your JSON data effortlessly with step-by-step instructions.
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Understanding jq Modifications: How to Modify Each Element of an Array

JSON (JavaScript Object Notation) is a widely-used data format, and manipulating its structure can often lead to desired outcomes. If you've ever worked with arrays in JSON, you know that sometimes you need to process or modify elements in a specific way to achieve your goals. In this post, we will address a common issue: how to modify each element of an array using jq.

The Challenge

Imagine you have the following JSON structure consisting of titles and references:

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Your goal is to modify the reference array so that each element appears in a specific format, doubling each reference and inserting the word "is" between the two identical elements. The desired output looks like this:

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The Solution

To achieve this transformation using jq, the following command works perfectly:

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Let's break down the command and understand how it works.

Command Breakdown

.[].reference[]: This part selects each element of the reference arrays in your JSON objects. The dot (.) represents the current object in the JSON array, and [].reference[] iterates through the reference array of each object.

|=: The pipe assignment operator |= is used to assign a new value to each element selected in the previous part of the command.

"(.) is (.)": Here, we create a string for each element. The (.) notation is used to reference the current element. By doing this, we double the element and include the word "is" in between.

Example Usage

To see the command in action, simply execute it in your terminal if jq is installed. Here’s how you can do that:

Save the JSON in a file called data.json.

Run the command in your terminal:

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Output

You should see an output similar to this:

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Conclusion

Manipulating JSON arrays with jq doesn't have to be complicated. By understanding how to select and modify elements effectively, you can transform your data to fit your needs. The command we've discussed allows you to gracefully modify each element of an array, enriching the output with a minimalistic yet powerful jq syntax.

Whether it’s for data processing, API responses, or just structuring JSON data, jq is an invaluable tool in any developer's arsenal.

Feel free to try this command on your datasets, and see how jq can simplify your JSON handling tasks!