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How to transform JSON to CSV in JQ?
It appends the values to an array, which gives you an array of arrays with the values, which is what you want when you’re transforming JSON into CSV. $cols, $rows [] | @csv puts the column headers first in the array, and then each of the arrays that are transformed to lines by piping them to @csv , which formats the output as… csv.
How do I format JSON into CSV format?
Finally, the sequence is passed through @csv formatter. The items can be separated late, rather than early. Instead of using the comma operator to get a sequence (passing a sequence as the right operand), the header sequence ( $keys) can be wrapped in an array, and + used to append the array of values.
How does compact output work in json seq?
Compact output (the -c option) shows that each array element (or argument to the , filter) becomes a separate object in the output (each is on a separate line). A stream is like a JSON-seq, but uses newlines rather than RS as an output separator when encoded.
How is JSON converted to an internal type?
The input JSON stream gets converted to some internal type which is passed through the filters, then encoded in an output stream at program’s end. The internal type isn’t modeled by JSON, and doesn’t exist as a named type.
Can a JSON array be transformed to a CSV file?
You can pick out keys and values from JSON data in jq as well, but today we’re going to use it to transform structured content in an JSON array to a CSV file. Because your boss wants stuff in Excel sheets, right?
Can a JSON object be an array of objects?
There are plenty of Q&As on this site that cover specific data models which hard-code the fields, but answers to this question should work given any JSON, with the only restriction that it’s an array of objects with scalar properties (no deep/complex/sub-objects, as flattening these is another question).
How to Format column headers in CSV file?
$cols, $rows [] | @csv puts the column headers first in the array, and then each of the arrays that are transformed to lines by piping them to @csv , which formats the output as… csv.