JSON wrangling with jq
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Filter data

Select Multiple Fields

The GitHub issues API has a lot of details I don’t care about. I want to select multiple fields from the returned JSON document and leave the rest behind.

The easiest way to do this is using , to specify multiple filters:

jq ' .[].title, .[].number' issues.json

But this is returning the results of one selection after the other. To change the ordering, I can factor out the array selector:

jq '.[] | .title, .number' issues.json

This refactoring uses a pipe (|), which I’ll talk about shortly, and runs my object selectors (.title and .number) on each array element.

If you wrap the query in the array constructor you get this:

jq '[ .[] | .title, .number ]' issues.json

But this still isn’t the JSON document I need. To get these values into a proper JSON object, I need an object constructor.

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