Question 1

How do I convert JSON to CSV with jq.node?

Accepted Answer

Use the built-in 'csv' helper from json2csv in your transformation, e.g., 'jqn "map('name') | csv"' to output CSV. Ensure the input is an array of objects for proper conversion.

Question 2

jq.node or jq: which is better for daily CLI use?

Accepted Answer

Choose jq.node if you value JavaScript syntax and npm module integration for complex tasks; opt for jq if you need maximum speed and a lightweight binary. jq.node excels in extensibility, jq in performance.

Question 3

How to import npm modules like moment.js in jq.node?

Accepted Answer

Use the --require flag, e.g., 'jqn --require moment "thru(a => moment.utc(a))"'. jq.node automatically installs missing modules temporarily and exposes them in camelCase if needed.

Question 4

Can jq.node handle JSON streams for large files?

Accepted Answer

No, JSON-stream support is listed as a roadmap item but not yet implemented, so it loads the entire input into memory, making it unsuitable for streaming large datasets.

Question 5

What's the performance impact of using jq.node on big JSON files?

Accepted Answer

Expect slower processing times compared to jq—up to 100x slower in some cases—due to JavaScript overhead, as shown in the README benchmarks with user-reported times.

Question 6

How to use jq.node in a Node.js script instead of the CLI?

Accepted Answer

Require the 'jq' function from the module and call it with input, transformation, and options, supporting both callbacks and promises via bluebird, as detailed in the API section.

jq.node

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