How to list object key names with jsonpath?

jsonPath has new update jsonpath-plusjsonpath-plus expands on the original specification to add some additional operators and makes explicit some behaviors the original did not spell out.

^ for grabbing the parent of a matching item~ for grabbing property names of matching items (as array)

so to get proper output use this query "things.*~" you can try here also https://jsonpath.com/

I don't believe there is a better solution than your own:

Object.keys(jsonpath.eval(jsonStructure,"$.things").pop());

I think the main misconception here is that you don't have to worry about this snippet "getting a copy of the whole structure", because you aren't copying the whole structure. You already have the entire object loaded into memory, jsonpath doesn't create a new copy, it simply returns a reference to the already existing object, i.e.:

jsonpath.eval(jsonStructure,"$.things").pop() === jsonStructure.things //true

Not exactly what you are asking for, but might still be relevant.

We use object-scan for this kind of task as it is much better suited for data processing and analyzing. Once you wrap your head around it that is (:

Anyways, here is how you could answer your question if you are willing to add another dependency

// const objectScan = require('object-scan');const data = { things: { books: [ { name: 'book1' }, { name: 'book2' }, { name: 'book3' }, { name: 'book4' } ], movies: [ { name: 'movie1' }, { name: 'movie2' }, { name: 'movie3' }, { name: 'movie4' } ] } };console.log(objectScan(['things.*'], { rtn: 'property' })(data));// => [ 'movies', 'books' ]

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