lukeed/flattie

A tiny (203B) and fast utility to flatten an object with customizable glue

flattie's Issues

Keep empty arrays and objects

Saw your new version last week and had to check if it could replace the one I've written. Among the test cases I've used is the Reddit JSON output, i.e.: https://www.reddit.com/r/cute.json

The one thing missing in flattie is keeping empty arrays or objects. I very much depend on the output to be reversible (unflatten(flatten(input)) deep equal to input), so I can't replace my implementation (yet).

Could keepNullish also keep other empty structures or could you change it to keepEmpty = <none, null, all>?

PS: Additional info about why I'm even flattening. I'm using a DB that holds JSON records, but only the first level can be indexed (i.e. no '.' inside the attribute selector). The API on-top does now transparent flattening/unflattening on write&read to make creating indexes easier. But consumers of the API would see the magic if empty structs are dropped.

Possible to keep null values?

Right now I'm using a less-awesome library for merging objects as part of some JSON:API tooling, but specs for JSON:API treat null as a meaningful value (used to specify deleting a property on a sparse update).

I see you're checking for null explicitly if (val == null) I'm wondering if there might be a way to specify keeping null?

❤️ 🙇

invalid result for nested array

$ npm install --save flat-obj
...
+ [email protected]
$ node

> flatObj = require('flat-obj');
[Function: flatten]
> flatObj({a: null, b: 'c', d: [1,2] })
{ b: 'c', d: [ {}, {} ] }
> flatObj({a: null, b: 'c', d: [1,2], e: { f: ['g', 'h']}})
{ b: 'c', d: [ {}, {} ], e_f: [ { '0': 'g' }, { '0': 'h' } ] }