just-flush-recursively / just-flush-deep / just-deep-flush / just-flush-object?

[kachkaev]

Hi @angus-c, great repo! 💯

I bumped into just-flush which was very close a function I needed. I wonder if you’d be open to accept a PR with a recursive version of the function, WDYT?

const fn = require('just-...')

fn([1, undefined, 2, [null], 3, NaN, 0]) // fn([1, 2, [], 3, 0])
fn({a: 2, b: null, c: 4, d: undefined, e: { x: 2, y: null, z: undefined }}) // flush({a: 2, c: 4, e: { x: 2 }})

It might be also useful to consider a mode when nullish items are not removed from arrays, but not 100% sure about this 🤔

-fn([1, undefined, 2, [null], 3, NaN, 0]) // fn([1, 2, [], 3, 0])
+fn2([1, undefined, 2, [null], 3, NaN, 0]) // fn([1, 2, [null], 3, 0])

[kachkaev]

My current solution is this:

/**
 * Recursively removes null and undefined values from an object
 * https://stackoverflow.com/a/54707141/1818285
 * TODO: consider refactoring (avoid conversion to string)
 */
export const deepClean = <T>(obj: T): OmitNullable<T> =>
  JSON.parse(
    JSON.stringify(obj, (key, value: unknown) =>
      value === null || value === undefined ? undefined : value,
    ),
  ) as OmitNullable<T>;

It works well for relatively small objects, but obviously does not scale if a JSON is very large. I’m looking for some third-party package that would save me from copying this small helper function between repos.

[angus-c]

Hi @kachkaev, thanks for the nice words!
Yes I think this would be a useful util. I think a new function just-flush-recursive would be the best way, to keep the old one clean.