Question 1

How do I filter JSON data using fx?

Accepted Answer

Pipe JSON into fx and use a JavaScript function, e.g., `cat data.json | fx '.filter(item => item.active)'`. This applies the filter interactively or in a script. See the documentation for more examples on mapping and reducing data.

Question 2

What's the difference between fx and jq?

Accepted Answer

fx focuses on interactive exploration with a JavaScript-based interface, while jq uses a specialized query language optimized for performance and complex transformations. Choose fx for quick, interactive tweaks and jq for scriptable, high-performance processing.

Question 3

Can fx handle streaming JSON input?

Accepted Answer

No, fx processes JSON as a whole and does not support streaming. For large or continuous data streams, consider tools like jq or specialized streaming libraries that can handle incremental processing.

Question 4

How to install fx on macOS?

Accepted Answer

Use Homebrew: run `brew install fx`. Alternatively, download the standalone binary from the GitHub releases page and add it to your PATH for quick terminal access.

Question 5

Is there a way to save output from fx to a file?

Accepted Answer

Yes, pipe the transformed JSON to a file, e.g., `cat input.json | fx 'yourFunction' > output.json`. This works with both interactive and non-interactive modes, ensuring processed data can be stored for later use.

Question 6

What keyboard shortcuts are available in fx's interactive mode?

Accepted Answer

Common shortcuts include arrow keys for navigation, Enter to expand/collapse nodes, and Esc to exit. Refer to the online documentation at fx.wtf for a full list and customization options.

fx

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